There are 2 types of headset singers, one who sing along in the worst voice possible to the song, the other who just have an overused song playing through their headset and may not realize it. The intentional ones should be immediatly asked to stop. If they do not stop, mute them. They are the least annoying danger in all of MW2,w@w, and cod4. The first few include faggot funnel users, knife monkeys, and UMP45 douchebags.