You get banned from the game if you get revoked. The only reason Badspot would revoke someone's key is if they're using a hack, crashed a server, DDoS a server, key sharing, caught using someone's key without that someone's approval (i.e. he stole it) and/or commiting a crime ingame. (I.e. passing out CP links).
From the forums, you can get banned if you break the rules but you will only get banned from the game via a forum post if it has evidence that you did anything that I posted before.
