Yeah, that is a big problem. The only thing I can think of is to allow vote-kicks/bans. Account creation can only happen with mobile numbers to discourage spam

Yeah, that is a big problem. The only thing I can think of is to allow vote-kicks/bans. Account creation can only happen with mobile numbers to discourage spam and other violations and people just creating another account with a new mail. You could also use this as an opportunity for another monetization system which allows people to pay for a reserved channel and moderation rights. The owners would be incentivized to behave in a reasonable manner because people could just move to an umoderated channel if they don't like the administration. I see the chats in a semi persistent state between reddit/discord and kik/jodel etc. Not persistent over weeks or months but also not as short lived as a one day discussion that gets lost in new posts.