The /f/lockdraw moderation system allows users who have been made into global moderators to kick or ban troublesome users. These moderators can also undo malicious changes to the drawings in the room and mute rooms and users to prevent people from joining just to scribble over others' work.
Currently, users can only become moderators if enough of the current moderators vote for them. Registered users, however, automatically become room mods in rooms they create. This allows them to use the image upload, undo, and mute functions in their rooms only.