Your Biggest Dick Move

[Parallel Streaks]

Thhis guy in a L4D match had been insulting me for quite a few rounds, and while we infected he spawned as a Hunter and I spawned as a Boomer. He managed to pin down a survivor nicely seperated from the group, and was about to kill him. I fixed this by setting myself on fire and standing next to him. My explosion knocked the hunter off of the guy, and drenched the guy in my boomer bile. the horde that came killed him, and I got the kill.

He rage-quit shortly after that, after the fifth time the vote to kick me failed. Everybody else thought he was a douche, it seems.

 

[Yoshi-Pop]

I slept with my brother's ex-girlfriend in the hatch of his car. Never told him, but I don't know if that's MORE of a dick move or less.

 

[RhusRadicans]

In TF2, I occasionally waste ammo deliberately so I can pick up junk/ammo off of the ground, thus depriving enemies/cloaked spies of the advantage.
Also, I use the Sandman constantly, even taking random long-range shots on the off-chance of hitting someone and knocking him out for some 20 seconds. It's always freaking hysterical when it actually connects.