One time I found out that kids on my school were playing Aliens vs. Predator on the school network. I silently joined them in their game. I chose to play as a Predator, while most others were marines. I slaughtered them all.
Without dying once, I got on top of the score list.
Then I heard some kid say "Who's Angrist??" followed by a "I think he's the guy over there..."
Then my next class was starting and the next day the school had uninstalled and forbidden games on the server.