One of my favorite things about Modern Warfare 2 on the PS3 is the ability to join games in progress that your friends are in. Sometimes you get stuck on the same team.

Other times you are at odds.

Nothing is more frustrating than thinking you’re playing a game with a bunch of anonymous people, racking up the kills, and then suddenly witnessing your death and seeing the callsign of a friend pop up as the culprit. On the other hand, few things are as satisfying as joining a game in progress which several of your friends are playing, landing yourself on the opposing team, and proceeding to mercilessly rend the flesh from their bones. Bonus points if the team was winning before and you are instrumental in their defeat.

Thank you, Infinity Ward, for adding friend griefing to the mix.