Do you have any gaming pet peeves?

What's something someone can do to you in a multiplayer game that just becomes immediately aggravating? For me whenever i'd get sniped on HALO 3 and someone would Tbag me afterward i would want to chuck the controller into the TV

getting killed right after respawning is the worst

getting team killed in CS if my mate is tilted, game completely over after that, because my mental breaks

Dungeon rushing with players who have not learned dungeon mechanics in MMORPG games.

getting killed right after respawning is the worst

People that camp, plain and simple, just there because they lack the skill to kill someone