The Guardian only talks about Warhol, but there was a total of 46 art works lost. They weren’t all made by him.

In case of minors and pornography, most societies have come to the conclusion that there is no problem with that.

If some people want to fight this, they should fight this issue (this would be very much a losing battle in all places in my opinion), not age verification systems, because the second would not exist without laws like the first one.