Even if every state started putting contactless chips into drivers licenses to provide anonymous age attestation, you'd still have the problem a kid can just use a parent's or older sibling's card.
And even if such cards did exist and they were considered legally adequate, you've still got the problem that nothing except smartphones can read them. And you've got the problem browsers don't support them, and app stores don't welcome porn-viewing apps.
Of course, this is all intentional - the religious anti-pornography groups that push for these laws consider it a good thing that complying with the law is essentially impossible. They want a full ban on pornography, but that would get struck down as unconstitutional, so they have to get a ban by indirect means.
Even if every state started putting contactless chips into drivers licenses to provide anonymous age attestation, you'd still have the problem a kid can just use a parent's or older sibling's card.
And even if such cards did exist and they were considered legally adequate, you've still got the problem that nothing except smartphones can read them. And you've got the problem browsers don't support them, and app stores don't welcome porn-viewing apps.
Of course, this is all intentional - the religious anti-pornography groups that push for these laws consider it a good thing that complying with the law is essentially impossible. They want a full ban on pornography, but that would get struck down as unconstitutional, so they have to get a ban by indirect means.