diff --git a/drizzle/0003_wakeful_doctor_spectrum.sql b/drizzle/0003_wakeful_doctor_spectrum.sql
new file mode 100644
index 0000000..0718cbd
--- /dev/null
+++ b/drizzle/0003_wakeful_doctor_spectrum.sql
@@ -0,0 +1,8 @@
+CREATE TABLE "banned_users" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"user_id" bigint NOT NULL,
+	"reason" text,
+	"banned_by" bigint NOT NULL,
+	"created_at" timestamp DEFAULT now() NOT NULL,
+	CONSTRAINT "banned_users_user_id_unique" UNIQUE("user_id")
+);
diff --git a/drizzle/meta/0003_snapshot.json b/drizzle/meta/0003_snapshot.json
new file mode 100644
index 0000000..ac6889e
--- /dev/null
+++ b/drizzle/meta/0003_snapshot.json
@@ -0,0 +1,281 @@
+{
+  "id": "e566bacf-bce1-4a35-b020-5f9724aa4e99",
+  "prevId": "92655a53-6225-4b92-87d3-8df7ba9778e8",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.banned_users": {
+      "name": "banned_users",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "reason": {
+          "name": "reason",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "banned_by": {
+          "name": "banned_by",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "banned_users_user_id_unique": {
+          "name": "banned_users_user_id_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "user_id"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.chat_configs": {
+      "name": "chat_configs",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "chat_id": {
+          "name": "chat_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "role_manage_permission": {
+          "name": "role_manage_permission",
+          "type": "role_manage_permission",
+          "typeSchema": "public",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'all_admins'"
+        },
+        "role_mention_permission": {
+          "name": "role_mention_permission",
+          "type": "role_mention_permission",
+          "typeSchema": "public",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'everyone'"
+        },
+        "role_admin_permission": {
+          "name": "role_admin_permission",
+          "type": "role_admin_permission",
+          "typeSchema": "public",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'all_admins'"
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "chat_configs_chat_id_unique": {
+          "name": "chat_configs_chat_id_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "chat_id"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.role_members": {
+      "name": "role_members",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "role_id": {
+          "name": "role_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "role_members_role_id_roles_id_fk": {
+          "name": "role_members_role_id_roles_id_fk",
+          "tableFrom": "role_members",
+          "tableTo": "roles",
+          "columnsFrom": [
+            "role_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.roles": {
+      "name": "roles",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "slug": {
+          "name": "slug",
+          "type": "varchar(32)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "aliases": {
+          "name": "aliases",
+          "type": "varchar(32)[]",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'{}'"
+        },
+        "chat_id": {
+          "name": "chat_id",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {
+    "public.role_admin_permission": {
+      "name": "role_admin_permission",
+      "schema": "public",
+      "values": [
+        "everyone",
+        "all_admins",
+        "only_owner"
+      ]
+    },
+    "public.role_manage_permission": {
+      "name": "role_manage_permission",
+      "schema": "public",
+      "values": [
+        "everyone",
+        "all_admins",
+        "admin_can_promote_members",
+        "admin_can_change_info",
+        "admin_can_manage_chat",
+        "only_owner"
+      ]
+    },
+    "public.role_mention_permission": {
+      "name": "role_mention_permission",
+      "schema": "public",
+      "values": [
+        "everyone",
+        "all_admins",
+        "only_owner"
+      ]
+    }
+  },
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}
\ No newline at end of file
diff --git a/drizzle/meta/_journal.json b/drizzle/meta/_journal.json
index 63dba7c..45c2c85 100644
--- a/drizzle/meta/_journal.json
+++ b/drizzle/meta/_journal.json
@@ -22,6 +22,13 @@
       "when": 1765468835132,
       "tag": "0002_bored_stephen_strange",
       "breakpoints": true
+    },
+    {
+      "idx": 3,
+      "version": "7",
+      "when": 1771342325809,
+      "tag": "0003_wakeful_doctor_spectrum",
+      "breakpoints": true
     }
   ]
 }
\ No newline at end of file
diff --git a/src/bot/commands/admin/role-add.ts b/src/bot/commands/admin/role-add.ts
index 63682c1..1682659 100644
--- a/src/bot/commands/admin/role-add.ts
+++ b/src/bot/commands/admin/role-add.ts
@@ -2,6 +2,7 @@ import type { BotType } from '@/bot/index.js'
 import { bold, code, format, italic } from 'gramio'
 import { RESERVED_NAMES, ROLE_NAME_REGEX } from '@/bot/utilities/constants.js'
 import { updateChatCommands } from '@/bot/utilities/commands.js'
+import { BanlistService } from '@/shared/services/banlist.js'
 import { PermissionService } from '@/shared/services/permission.js'
 import { RoleService } from '@/shared/services/role.js'
 
@@ -11,6 +12,11 @@ export default (bot: BotType) => {
       return ctx.reply('This command can only be used in groups or supergroups')
     }
 
+    const banned = await BanlistService.isBanned(ctx.from.id)
+    if (banned) {
+      return ctx.reply('you are globally banned from creating roles')
+    }
+
     const canManage = await PermissionService.canManageRoles(ctx.chat.id, ctx.from.id)
     if (!canManage) {
       return ctx.reply('You don\'t have permission to manage roles')
diff --git a/src/bot/commands/global/gban.ts b/src/bot/commands/global/gban.ts
new file mode 100644
index 0000000..7d4fae5
--- /dev/null
+++ b/src/bot/commands/global/gban.ts
@@ -0,0 +1,36 @@
+import type { BotType } from '@/bot/index.js'
+import { bold, code, format } from 'gramio'
+import env from '@/shared/env.js'
+import { BanlistService } from '@/shared/services/banlist.js'
+
+export default (bot: BotType) => {
+  bot.command('gban', async (ctx) => {
+    if (!env.globalAdmins.includes(ctx.from.id)) {
+      return
+    }
+
+    const args = (ctx.args ?? '').trim().split(/\s+/)
+    const targetId = Number(args[0])
+    const reason = args.slice(1).join(' ') || undefined
+
+    if (!targetId || Number.isNaN(targetId)) {
+      return ctx.reply(format`usage: ${code('/gban <user_id> [reason]')}`)
+    }
+
+    if (env.globalAdmins.includes(targetId)) {
+      return ctx.reply('can\'t ban a global admin')
+    }
+
+    const existing = await BanlistService.isBanned(targetId)
+    if (existing) {
+      return ctx.reply('user is already banned')
+    }
+
+    const banned = await BanlistService.ban(targetId, ctx.from.id, reason).catch(() => null)
+    if (!banned) {
+      return ctx.reply('failed to ban user')
+    }
+
+    return ctx.reply(format`${bold('user globally banned')}\nid: ${code(String(targetId))}${reason ? `\nreason: ${reason}` : ''}`)
+  })
+}
diff --git a/src/bot/commands/global/gbanlist.ts b/src/bot/commands/global/gbanlist.ts
new file mode 100644
index 0000000..11c138f
--- /dev/null
+++ b/src/bot/commands/global/gbanlist.ts
@@ -0,0 +1,23 @@
+import type { BotType } from '@/bot/index.js'
+import env from '@/shared/env.js'
+import { BanlistService } from '@/shared/services/banlist.js'
+
+export default (bot: BotType) => {
+  bot.command('gbanlist', async (ctx) => {
+    if (!env.globalAdmins.includes(ctx.from.id)) {
+      return
+    }
+
+    const banned = await BanlistService.list()
+
+    if (!banned.length) {
+      return ctx.reply('banlist is empty')
+    }
+
+    const lines = banned.map((b, i) =>
+      `${i + 1}. ${b.userId}${b.reason ? ` — ${b.reason}` : ''}`
+    )
+
+    return ctx.reply(`globally banned users:\n${lines.join('\n')}`)
+  })
+}
diff --git a/src/bot/commands/global/gunban.ts b/src/bot/commands/global/gunban.ts
new file mode 100644
index 0000000..c6fa142
--- /dev/null
+++ b/src/bot/commands/global/gunban.ts
@@ -0,0 +1,25 @@
+import type { BotType } from '@/bot/index.js'
+import { code, format } from 'gramio'
+import env from '@/shared/env.js'
+import { BanlistService } from '@/shared/services/banlist.js'
+
+export default (bot: BotType) => {
+  bot.command('gunban', async (ctx) => {
+    if (!env.globalAdmins.includes(ctx.from.id)) {
+      return
+    }
+
+    const targetId = Number((ctx.args ?? '').trim())
+
+    if (!targetId || Number.isNaN(targetId)) {
+      return ctx.reply(format`usage: ${code('/gunban <user_id>')}`)
+    }
+
+    const unbanned = await BanlistService.unban(targetId)
+    if (!unbanned) {
+      return ctx.reply('user is not banned')
+    }
+
+    return ctx.reply(`user ${targetId} unbanned`)
+  })
+}
diff --git a/src/bot/utilities/constants.ts b/src/bot/utilities/constants.ts
index 196ab29..d50b29a 100644
--- a/src/bot/utilities/constants.ts
+++ b/src/bot/utilities/constants.ts
@@ -1,2 +1,2 @@
 export const ROLE_NAME_REGEX = /^[a-z]{4,32}$/i
-export const RESERVED_NAMES = ['roleadd', 'roledel', 'join', 'leave', 'myroles', 'roles', 'config', 'reload']
+export const RESERVED_NAMES = ['roleadd', 'roledel', 'join', 'leave', 'myroles', 'roles', 'config', 'reload', 'gban', 'gunban', 'gbanlist']
diff --git a/src/shared/database/schema.ts b/src/shared/database/schema.ts
index 9f514dd..bb5b35f 100644
--- a/src/shared/database/schema.ts
+++ b/src/shared/database/schema.ts
@@ -1,4 +1,4 @@
-import { bigint, pgEnum, pgTable, timestamp, uuid, varchar } from 'drizzle-orm/pg-core'
+import { bigint, pgEnum, pgTable, text, timestamp, uuid, varchar } from 'drizzle-orm/pg-core'
 
 // Enums for permission levels
 export const roleManagePermissionEnum = pgEnum('role_manage_permission', [
@@ -40,6 +40,15 @@ export const roleMembersSchema = pgTable('role_members', {
   createdAt: timestamp('created_at').notNull().defaultNow(),
 })
 
+export const bannedUsersSchema = pgTable('banned_users', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  userId: bigint('user_id', { mode: 'number' }).notNull().unique(),
+  reason: text('reason'),
+  bannedBy: bigint('banned_by', { mode: 'number' }).notNull(),
+
+  createdAt: timestamp('created_at').notNull().defaultNow(),
+})
+
 export const chatConfigSchema = pgTable('chat_configs', {
   id: uuid('id').primaryKey().defaultRandom(),
   chatId: bigint('chat_id', { mode: 'number' }).notNull().unique(),
diff --git a/src/shared/env.ts b/src/shared/env.ts
index 1f80ec3..b6cc674 100644
--- a/src/shared/env.ts
+++ b/src/shared/env.ts
@@ -9,4 +9,5 @@ export default {
   mode: env.get('NODE_ENV').default('production').asString(),
   databaseUrl: env.get('DATABASE_URL').required().asString(),
   botToken: env.get('BOT_TOKEN').required().asString(),
+  globalAdmins: env.get('GLOBAL_ADMINS').default('').asString().split(',').filter(Boolean).map(Number),
 }
diff --git a/src/shared/services/banlist.ts b/src/shared/services/banlist.ts
new file mode 100644
index 0000000..f274e3b
--- /dev/null
+++ b/src/shared/services/banlist.ts
@@ -0,0 +1,36 @@
+import { eq } from 'drizzle-orm'
+import database from '../database/index.js'
+import { bannedUsersSchema } from '../database/schema.js'
+
+export class BanlistService {
+  static isBanned(userId: number) {
+    return database
+      .select()
+      .from(bannedUsersSchema)
+      .where(eq(bannedUsersSchema.userId, userId))
+      .then(result => result[0] ?? null)
+  }
+
+  static ban(userId: number, bannedBy: number, reason?: string) {
+    return database
+      .insert(bannedUsersSchema)
+      .values({ userId, bannedBy, reason })
+      .returning()
+      .then(result => result[0] ?? null)
+  }
+
+  static unban(userId: number) {
+    return database
+      .delete(bannedUsersSchema)
+      .where(eq(bannedUsersSchema.userId, userId))
+      .returning()
+      .then(result => result[0] ?? null)
+  }
+
+  static list() {
+    return database
+      .select()
+      .from(bannedUsersSchema)
+      .orderBy(bannedUsersSchema.createdAt)
+  }
+}