For the better part of two decades I frequented a particular forum, and one of the most common reasons people tended to eventually get banned wasn't because of

For the better part of two decades I frequented a particular forum, and one of the most common reasons people tended to eventually get banned wasn't because of any particularly egregious political opinion, but because whatever opinion they held they tended to turn every thread they participated in anywhere into either a thread about that or a thread about them.