There's no way I'm gonna plug the headset in unless I'm playing with people I know well. Every time I've tried using a mic with randoms has ended in annoyance - kids, idiots, kidiots, people shouting racial and homophobic insults (despite me being white and straight) because they think it's clever, witty comments about my accent (apparently people on XBL have never heard a British person before?)... yeah, no. Not going there.