Kigen's Anti-Cheat

I see, so there's nothing I can do then. Thanks anywho.

STEAM_0:0:21710980 Hello. Upon recently attempting to connect to a TF2 server, I recieved the "Disconnect: You are banned from all Kigen's Anti-Cheat (KAC) protected servers. See http://www.kigenac.com/ for more information." message. My friend, who was the previous owner, gave this accoun...