In person web of trust in order to join any private community. It'll suck and be hard in the beginning, but once you reach a threshold, it'll be OK. Ban entire trees of users when you discover bots/puppets, to set an example.
So we expect either 1. people using AI and copy pasting into the human-only network, or 2. other people claiming your text sounds like AI and ostracizing you for no good reason. It won't be a happy place - I know from anti-generative AI forums.