And people should be free to pick and choose whether they want to use sites that do that or not. Whatever hacker news does seems to be fine for me, and I did not need to verify my ID in any way (even though it's very easy to figure out who I am from this profile)

It could be done with anonymous credentials though. No tracing to who the human is.

Anonymous in terms of it not being possible to derive the real world identity of the human from the value, sure. Anonymous in terms of providing no durable way to ban that human from the platform? No.

Until people hit "attest" and then copy the text from ChatGPT.

Those people would be subjected to permanent, identity-bound bans.

Being unpersoned for using copy/paste one time is certainly one of the political proposals of all time