I think we are going to need some kind of certificates vouching for humans being humans.
Could slow spam down though.
The best you can do is pseudonymity. If the attestations are completely anonymous then you have no way of dealing with bad actors, like those who sell their digital identity to spammers.
This is possible with the German identity card. (I have no idea but my guess would be that this is possible with other identity cards from Europe or around the world too.) You can even make age checks with out transmitting the actual birthday. It just returns whether the card holder has or is above the age in question. You can't cross reference those certs with other sites.
It really grinds my gears if a identity check wants a video call or what ever instead of them using eID features.
No it is not a solution. What prevents me from "selling" my biometrics to someone to be used for nefarious purposes? Or you are proposing putting an orb in from of every computer and not allow accessing the Web without scanning user's iris every time they type web-site address? Even if such dystopia get implemented we will end up with situation when bunch of real people in third-word countries are getting paid 2$ a day to sit in front of a computer playing games all day while getting their eyes periodicaly scanned to allow spammer botnet to browse the Web.
> I think we are going to need some kind of certificates vouching for humans being humans.
Who are "we"? Me and probably absolute majority of other users are perfectly fine with the way the Web currently works and don't care about the cost of fraud for Google's ad empire.