Alright, I just got finished playing a game of Uncharted 2 with the most immature person I've ever played with. It was a matchmaking game, thankfully this guy is not on my friends list. Anyway, the game starts, and right away he starts complaining about how people are always killing him from behind, how everyone always uses shot-guns, etc. It doesn't take long for someone to do exactly what he was talking about, and when that happened he got pissed. He started using the generic insults such as "gay", "fag", and all those lousy terms. The thing that really bothered me was that I started walking beside him, trying to help him out and trying to kill whoever is killing him. Right when we started shooting him he yelled "I SWEAR TO GOD IF YOU DON'T GET OUT OF MY WAY!!!" At that point, I just wanted to pull out my Rock Band microphone and yell right back. Instead, I let him get killed by himself. I didn't help him at all after that. 
 
Just to give you an idea of how much complaining he was doing, it reminded me of Darksydephil. He was complaining and bitching about every single little thing that happened in the game, and it reminded me how smart I am as a person. Sure I sometimes get mad while playing online, but I don't yell "DUDE YOU'RE SUCH A FAG!!!!11!" at anyone. You get killed in games. Sometimes you win, sometimes you lose, that's just how it goes. 
 
And I'm pretty sure that dude was older than me, too. What a way to set an example, bro.