The mods mute them for the length of time that is customary, and they get bird pooped by typing the dot command BirdPoopBadPlayer.
All the misbehaving player sees is bird poop all over his windscreen for the said customary time.
The mods take some verbal abuse sometimes. At least they can have some fun when they get abused. We appreciate the time the mods put in to keep it a fun game.