> Can the site owner and the government collude to track you? Yes they can! Government can track all salts for your tokens, site can collect all salts, they can compare notes. There are so called policy mitigations currently: audits and requirements for governments to remove salts from memory the moment stuff is issued.

It's not zero knowledge for me then. Also - if there is ANY possibility to track anyone. And/or centrally mark someone "nonverified" then it makes more problems than solves.

Even if I trust my govt (no way), even if it'd be fully ZK with no way to track anyone… still govt would have a way to just block some individual "because".

And the best part… Age verification will not solve "children problem". I think it's parents problem to take care of their children, AV will be pretty easy to bypass - kid will just borrow ID for a moment and… voila! Govts (or some people) are creating problem and solution that do not exists.

I do not like way internet went, I do not like more way it's headed now.