OK, I usually hate people who cause havoc on servers.. BUT THIS GUY IS HILARIOUS. He was blocking a doorway in spawn by doing some crazy glitch, and the only way of them crossing is if they answered some trivia questions. He was also using a teleporter to teleport enemies to a spot being watched by two sentry guns and everytime they went through it they were instantly killed. There's a bunch more funny shit this guy was doing
SourceRadio - Now Playing: TF2 Griefing 2 (Team Roomba)
That's part two, part one is hilarious as well