Hot take: I'm in favour of this. There's actually been significant progress in developing privacy-preserving attestation technologies in the last few years, that could enable anonymous age verification for adult websites. There's an IETF protocol called Privacy Pass (see RFCs 9576-9578) that can attest facts about clients (e.g. their age) in an anonymising manner. You reveal your age by showing your ID to an age veri…
I'm in Australia and we're going to have the same problem with our under-16 social media ban.
There's privacy-preserving ways to do it, but they definitely won't use them.