Of course I haven't cheated, I never would, and I can't anyway.
I have killed teammates before but it was either an accident or because they fucking deserved it (i.e. they wouldn't cooperate with you or your team or they're being assholes to you or your own team)
I have ragequitted a couple times, for obvious reasons, though I seriously think it's better to quit when you're enraged than to keep playing angrily, probably bad for your health and you won't get any enjoyment out of it.
Mic spammed? Never, I use the mic for what it was intended to do, which is to communicate with other players RESPECTIVELY and for playing the actual game.