You can control offensive users by 'red dotting' them. You can also 'bounce' them or 'ban' them from your chat room.  Any 'admin' in your chat room may use these features unless otherwise specified.

note: as a security feature your chat room will vanish from the list of chat rooms if all of your admins leave the chat room - all entry to your chat room will be denied until an 'admin' returns to your chat room