Kigen's Anti-Cheat

I was playing one day on a covitgaming server mario cart 2 with was on 04-17-11 at 10:16 i went to go get a drink of water and i come back i was banned for KAC :eye angle violation but problem is i dont mess with tf2 i dont hack it idk y i was banned i own a mac idk if thats the problem why i was ...