Hit start I think it is and go to their name in a game where it shows all that are playing. Mute them and you wont have to hear any of it anymore. You can also do this on the main page that you are waiting to play on that assigns teams. I dont know the specific buttons to hit on ps3 but once they are highlighted you can mute them off. Its great for those kids that have screaching voices or the annoying useless cussing. Once in awhile I'll break the cussing of them and tell them to slow down and they wont die so much. Slow, steady, and watch your back. It comes up and says "Toggle mute"
Eat Claymore, Yeah fourbizz I just used your name but claymores are great for watching your back. ;D