Just a quick warning if you find yourself in a team with the "DarkMachina" callsign - he likes to shoot the other members of the team - shot me from behind with 2 x ac20s - killed one other and damaged another. Several others complained about the same type of behaviour. Probably a bored kid I'd guess, but nevertheless can ruin your game.
If memory serves, he's been around for quite a long time. Remember seeing him couple of times several months ago. He usually TKs and causes other annoyances for the team. Surprised he's still around being jerk like that.