Then you should tell him to stop doing annoying things.
I knew you'd be the next person to reply.
Maybe you guys should stop making such a big deal out of everything he does. Even the slightest thing. Maybe if you guys wouldn't acknowledge it, he wouldn't do stupid things, whether it be on purpose or not.
I may not like every thing he does, but you don't see me making some snarky comment about it every single time.