Digital human fortresses are totally becoming a thing.

For example, our community [0] asks you to submit an application before you're granted an invite code. If you attend a meetup in person we'll grant a "Verified Human" badge too. This gives you the power to invite others into the fortress: you're responsible for them.

The price to pay is steep because community growth is now glacial. It really does solve the slop problem though. (I'm also no longer convinced maximizing growth is Good.) Maybe there's some in-between solution for those who dislike invite-only spaces.

[0] https://handmadecities.com/chat