Huh. We're getting alot of FPS-specific bitching in here, when there's so much else to be pissed about.
Forget spamming and camping, why is nobody annoyed about wavedashing and snaking? I think there's just more 360 gamers than old Nintendo junkies here. In general, I can't stand powergamers. Anybody who concentrates on the metagame so much that it feels like you're playing an entirely different game. -And if you're not, they'll kill you instantly. It ruins the fun for everybody.
Do people here play Mario Kart DS online? If you don't snake, you don't win, period. The game you're playing is no longer Mario Kart, it's snaking. Mario Kart should be about the characters, the items, the tracks.. when really it's just about picking a character and kart that have the right stats to spam leftrightleftrightleftright really really fast. Honestly, there are better ways to get carpal tunnel syndrome.
Ever try playing Smash Melee against one of these people? The one tournament level guy I fought in the space of 10 seconds was able to pick Shiek, turn off all items, and pick Final Destination before I could say "hey you jerk, no items is for wimps who can't dodge a beam sword". He then proceeded to wave dash the crap out of me. SLIDESLIDESLIDEC-STICKDOWNSPIKE. I don't want to play my games with other people if said people are going to suck all the fun out of it and then give me a pounding migraine with the way they metagame. Seriously, you can hear the shoulder buttons screaming in pain.
The Powergamer: Anyone who cares more about winning than having fun, and also knows how to break games to do it. IMO; the natural evolution of a button masher. I can beat hackers with a little luck, but it's these people I really hate. Who's with me?