Most fun "revenge" / mean things to do raids

I remember pugging Naxx 25 on my lock and, when we got to Razuvious, the lowest dps (a blood elf male huntard) was kicked to invite a priest for MC. The hunter said "wtf" in /s a few times and asked why he was kicked while people summoned the new member. Then he did what all good trolls should do, ran in, pulled Razuvious and feigned death. Possibly the best boss to do it on as a tank can't taunt and save the day, it's a guaranteed wipe and great fun to see people nearly escape to the portal only to die.

Also on my lock, embittered at a 2k dps retard winning the Ony 25 caster sword ahead of my roll by 1, I set up a demonic circle near entrance, took out my void walker, set it passive and began gathering whelps. When they began to reach me, I popped a swiftness pot, set pet aggressive and used sacrifice... made it to telport and ran out still with speed buff using soul shatter to cause repair bills for 24 people.

Any interesting things you do just to annoy people when you're cheesed off?