I had not addressed this yet because I wished to confer with the other moderators first. I have now done so. The relevant facts are that, first, the rule against betting does not, in fact, apply to the Game Room, but that second, in the post in question, UltraVires clearly stated that it was his belief that it did apply. By engaging in behavior that he stated to be against board rules, he undermined the rules of the board and was unnecessarily provocative. Therefore, the warning stands.