Haha, I was actually called out yesterday playing FFA that I had a mod because every kill I got was a headshot. I was using the M16, and was doing quite well. Some people can never take a lose gracefully!!
Oh, and for the record, I do much better when there aren't 7 other people talking in my ear. I usually just mute everyone, and let silence be my guide. Having a turtlebeach headset helps a little, too. Especially with foot-steps.