diff --git a/README.md b/README.md
index 7981dfe..e249636 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,7 @@ Bot management commands.
 * !bot stats - show statistics on matrix users seen by bot
 
 The following must be done as the bot owner:
+
 * !bot enable [module] - enable module
 * !bot disable [module] - disable module
 * !bot quit - quit the bot process
@@ -53,6 +54,7 @@ The following must be done as the bot owner:
 The uri cache prevents the bot from uploading a blob from a url repeatedly
 * !bot leave - ask bot to leave this room
 * !bot modules - list all modules including enabled status
+* !bot rooms - list rooms the bot is on
 
 ### Help
 
@@ -183,11 +185,15 @@ Example:
 
 This module is for interacting with the room that the commands are being executed on.
 
-* !room servers:                                    Lists the servers in the room
-* !room joined:                                     Responds with the joined members count
-* !room banned:                                     Lists the banned users and their provided reason
-* !room kicked:                                     Lists the kicked users and their provided reason
-* !room state [event type] [optional state key]:    Gets a state event with given event type and optional state key
+* !room servers                                     Lists the servers in the room
+* !room joined                                      Responds with the joined members count
+* !room banned                                      Lists the banned users and their provided reason
+* !room kicked                                      Lists the kicked users and their provided reason
+* !room state [event type] [optional state key]     Gets a state event with given event type and optional state key
+* !room tombstone [target]                          Creates a tombstone event pointing to target room. Target room can be alias (starting with #) or id (starting with !).
+
+Note on tombstone: If using alias, bot must be present in target room. This is the preferred way. If using id, make sure it's correct, as it's not validated!
+Tombstoning requires power level for room upgrade. Make sure bot has it in the room.
 
 ### Welcome to Room
 
@@ -602,6 +608,15 @@ by default, but you can set any single instance to search on.
 * !pt setinstance [url] - Set instance url, must end with / (example: https://peertube.cpy.re/)
 * !pt showinstance      - Print which instance is used
 
+### User management
+
+Admin commands to manage users.
+
+#### Usage
+
+* !users list [pattern]  - List users matching wildcard pattern
+* !users kick [pattern]  - Kick users matching wildcard pattern from room
+
 ## Bot setup
 
 * Create a Matrix user
@@ -668,9 +683,9 @@ docker-compose up
 
 ## Env variables
 
-`MATRIX_USER` is the full MXID (not just username) of the Matrix user. `MATRIX_ACCESS_TOKEN` 
-and `MATRIX_SERVER` should be self-explanatory. Set `JOIN_ON_INVITE` (default true) to false 
-if you don't want the bot automatically joining rooms.
+`MATRIX_USER` is the full MXID (not just username) of the Matrix user. `MATRIX_ACCESS_TOKEN`
+and `MATRIX_SERVER` should be url to the user's server (non-delegated server). Set `JOIN_ON_INVITE` (default true) 
+to false if you don't want the bot automatically joining rooms.
 
 You can get access token by logging in with Element Android and looking from Settings / Help & About.
 
diff --git a/bot.py b/bot.py
index 1f0a0e7..2817b64 100755
--- a/bot.py
+++ b/bot.py
@@ -424,8 +424,8 @@ class Bot:
 
     async def memberevent_cb(self, room, event):
         # Automatically leaves rooms where bot is alone.
-        if room.member_count == 1 and event.membership=='leave':
-            self.logger.info(f"membership event in {room.display_name} ({room.room_id}) with {room.member_count} members by '{event.sender}' - leaving room as i don't want to be left alone!")
+        if room.member_count == 1 and event.membership=='leave' and event.sender != self.matrix_user:
+            self.logger.info(f"Membership event in {room.display_name} ({room.room_id}) with {room.member_count} members by '{event.sender}' (I am {self.matrix_user})- leaving room as i don't want to be left alone!")
             await self.client.room_leave(room.room_id)
 
     def load_module(self, modulename):
diff --git a/modules/bot.py b/modules/bot.py
index 87deab7..f13fd62 100644
--- a/modules/bot.py
+++ b/modules/bot.py
@@ -57,6 +57,8 @@ class MatrixModule(BotModule):
                 await self.export_settings(bot, event)
             elif args[1] == 'ping':
                 await self.get_ping(bot, room, event)
+            elif args[1] == 'rooms':
+                await self.rooms(bot, room, event)
 
         elif len(args) == 3:
             if args[1] == 'enable':
@@ -297,6 +299,14 @@ class MatrixModule(BotModule):
             bot.uri_cache = dict()
             bot.save_settings()
 
+    async def rooms(self, bot, room, event):
+        bot.must_be_owner(event)
+        rooms = []
+        for croomid in bot.client.rooms:
+            roomobj = bot.get_room_by_id(croomid)
+            rooms.append(roomobj.machine_name)
+        await bot.send_text(room, f'I\'m in following {len(rooms)} rooms: {rooms}')
+
     def disable(self):
         raise ModuleCannotBeDisabled
 
diff --git a/modules/loc.py b/modules/loc.py
index a1a7729..04a8f4d 100644
--- a/modules/loc.py
+++ b/modules/loc.py
@@ -39,7 +39,7 @@ class MatrixModule(BotModule):
                    latlon[0] + "&mlon=" + latlon[1]
 
         plain = sender + ' 🚩 ' + osm_link
-        html = f'{sender} 🚩 <a href={osm_link}>{location_text}</a>'
+        html = f'{sender} 🚩 <a href="{osm_link}">{location_text}</a>'
 
         await self.bot.send_html(room, html, plain)
 
diff --git a/modules/room.py b/modules/room.py
index 075dd19..ccfc2b9 100644
--- a/modules/room.py
+++ b/modules/room.py
@@ -43,6 +43,8 @@ class MatrixModule(BotModule):
             await MatrixModule.kicked_members(bot, room)
         elif command == 'state':
             await MatrixModule.get_state_event(bot, room, args)
+        elif command == 'tombstone':
+            await MatrixModule.tombstone(bot, room, args, event)
 
     @staticmethod
     async def servers_in_room(bot, room: nio.MatrixRoom):
@@ -210,3 +212,35 @@ class MatrixModule(BotModule):
         else:
             # Raise the error and the bot module will handle the rest
             raise res
+
+    @staticmethod
+    async def tombstone(bot, room, args, event):
+        bot.must_be_admin(room, event)
+
+        body = "This room has been replaced" # Todo: make settable
+
+        if len(args) == 2:
+            target = args[1]
+            if "#" in target:
+                targetid = await bot.get_room_by_alias(target)
+                if not targetid:
+                    await bot.send_text(room, f"Bot is not on room {targetid}?")
+                    return
+            elif "!" in target:
+                targetid = target
+            else:
+                await bot.send_text(room, f"Give a room alias (starts with #) or room id (starts with !)")
+                return
+
+            tombstone_event = {
+                "body": body,
+                "replacement_room": targetid
+                }
+            response = await bot.client.room_put_state(room.room_id, 'm.room.tombstone', tombstone_event)
+            if type(response) == nio.RoomPutStateResponse:
+                await bot.send_text(room, f"See you in the new room!")
+                await bot.client.room_leave(room.room_id)
+            else:
+                await bot.send_text(room, f"Error creating tombstone event: {response}")
+            return
+        await bot.send_text(room, f"Usage: !room tombstone #room:server.org")
diff --git a/modules/url.py b/modules/url.py
index 0f1c901..954890b 100644
--- a/modules/url.py
+++ b/modules/url.py
@@ -128,7 +128,7 @@ class MatrixModule(BotModule):
                     # failed fetching, give up
                     continue
 
-                msg = None
+                msg = ""
 
                 if status == "TITLE" and title is not None:
                     msg = f"Title: {title}"
@@ -143,7 +143,7 @@ class MatrixModule(BotModule):
                 elif status == "BOTH" and description is not None:
                     msg = f"Description: {description}"
 
-                if msg is not None:
+                if msg.strip(): # Evaluates to true on non-empty strings
                     await self.bot.send_text(room, msg, msgtype=self.type, bot_ignore=True)
         except Exception as e:
             self.logger.warning(f"Unexpected error in url module text_cb: {e}")
diff --git a/modules/users.py b/modules/users.py
new file mode 100644
index 0000000..0648ffb
--- /dev/null
+++ b/modules/users.py
@@ -0,0 +1,42 @@
+from modules.common.module import BotModule
+import fnmatch
+
+class MatrixModule(BotModule):
+    async def matrix_message(self, bot, room, event):
+        args = event.body.split()
+        args.pop(0)
+
+        if len(args) == 2:
+            if args[0] == 'list':
+                users = self.search_users(bot, args[1])
+                if len(users):
+                    await bot.send_text(room, ' '.join(users))
+                else:
+                    await bot.send_text(room, 'No matching users found!')
+                return
+            if args[0] == 'kick':
+                users = self.search_users(bot, args[1])
+                if len(users):
+                    for user in users:
+                        self.logger.debug(f"Kicking {user} from {room.room_id} as requested by {event.sender}")
+                        await bot.client.room_kick(room.room_id, user)
+                else:
+                    await bot.send_text(room, 'No matching users found!')
+                return
+        await bot.send_text(room, 'Unknown command - please see readme')
+
+    def search_users(self, bot, pattern):
+        allusers = []
+        for croomid in bot.client.rooms:
+            try:
+                users = bot.client.rooms[croomid].users
+            except (KeyError, ValueError) as e:
+                self.logger.warning(f"Couldn't get user list in room with id {croomid}, skipping: {repr(e)}")
+                continue
+            for user in users:
+                allusers.append(user)
+        allusers = list(dict.fromkeys(allusers)) # Deduplicate
+        return fnmatch.filter(allusers, pattern)
+
+    def help(self):
+        return 'User management tools'