The policy thread can be found
here in QS.
You'd have to work hard at getting banned. The member Jack was banned for calling up the host server and threatening legal action, he was always a whiny little pussy. Messenger was banned for threatening to kill the president but has since been let back. There was one other member who posted graphic descriptions of sex with children and was terminated.
Basically if you really want to be banned you'd have to do something that could result in harm to the board such as legal threats or posting illegal material. Things like browser crashing images or code will land you in the Daycare section at the bottom of the forum for a time out period.