Pointless discussions and trolling are against the rules, unless you're arguing he makes essential threads.
It is against forum rules but in most of cases, forum members don't get ban with this violation.
Even with very serious case, it is only temporarily ban and barely happens.
I don't know you knew or not, but the case of
game-protect is a very good example. Even the community asked to ban that one, it won't happen. Until he changed from trolling to doxing. He got 2 or 3 temporary ban and the last one is permanent ban (mainly because of doxing).