I believe that it is possible to compromise. Of course, the parents must play their role. But it doesn't mean that it should be legal to publish porn ads to kid

I believe that it is possible to compromise. Of course, the parents must play their role. But it doesn't mean that it should be legal to publish porn ads to kids, and hope that the parents install an ad blocker, does it? I don't think we can (and I don't think we should) completely block porn from the Internet. But I could imagine that privacy-preserving age verification on Pornhub could make it slightly less accessible to kids (even it if is by opening a link without knowing what it is). I wouldn't block VPNs though: if someone is able to access Pornhub with a VPN through a country that doesn't mandate age verification, then they will be able to access porn anyway. And then there is not only porn. To me the value of age verification is really to block kids from accessing social media. And again, no need to block VPNs there: it just has to be less accessible to kids. I don't believe that most kids will get a VPN to access social media. Kids are on social media because kids are on social media, we just need to break the network effect.