I'm undecided on what to do, but I'll just drop some input for consideration.
1. He has deliberately and knowingly broken rules multiple times. When admins are not on-line, he has continually come on and spammed the mic non-stop until we could finally get a mod on to mute him. It's extremely annoying when he does this and pretty much stops the game full force. We can't mute him individually because he just reconnects so that he can use his mic even when dead.
There is no reason to do this other than piss us off.
2. People don't change. Not really. If you willingly break rules for the lulz, then you've already decided that the lulz are worth it and you are willing to risk whatever punishment comes - since this has been demonstrated, my bet is that he's going to keep doing it.
I LIKE him, and I don't think he's going to fuck up on CT - but I actually would appreciate a flat out server-ban if he ever mic-spams like that again.
