Talkphotography. Been banned at least once. Can’t honestly remember why. Maybe swearing. Probably for calling people out for doing work for free. Probably for telling people their “street photography” is shite.
Had a few warnings on retrobike for calling out classifieds that have been ridiculously over priced or had other errors. “Off topic” discussion like “that’s not what you’re saying it is” or “you can get that cheaper on wiggle etc” it’s not allowed.