All I can think of right now is a much more involved captcha.
Then when you sign up to a service you can create a ZK proof that this service has said you're a human and that you haven't created another account before. This allows for anonymous registration while also proving you're not a bot.
The two biggest services for this are:
- Worldcoin - scan your eye in an orb and it attests you're human. This is integrated with Reddit and Discord already.
- Gitcoin Passport - connect it to your social media accounts, proof of humanity services etc and it gives you a humanity point score.
make a captcha sufficiently complex, and the bots will keep trying, while humans will stop trying and go away.
redirect the flow of humans to a "probablynotabotindex.html" page when they abdicate the captcha, and that good for now.
so if you want to seem human, learn how to be impatient, and quit a challange.
In order to get there, we have to solve computer security, so everyone can run their own stuff without it getting owned in a heartbeat.
Without that step, we're all doomed to things like walled gardens and "servers" on Discord.
It's fortunate that computer security was solved in the 1970s. It's unfortunate that nobody listened for decades as Moore's law made hardware insanely better.
People running their own stuff, moderating it, and establishing reputation is the only way to fly.