Still need a solution to age-verify without tracking though, or else people would think of it as something to be turned off immediately since Reddit and X would obviously not be on the registry since they host tremendous amounts of porn.

I don't think that's an intractable problem at all, and I think as technologists we should be putting our efforts into building the most trustworthy system for that instead of just campaigning for nothing to change because it's "the parents' problem." Easy for us to say: We're all either not parents, or we're the type who are equipped to properly filter access to the Internet for our young kids. In reality, the single mom of 3 working 12 hours a day is not equipped to "just" set up a proxy server or figure out how to install internet filtering software on the Amazon Fire tablet she got her 8-year-old to watch Spider-Man.

Separately from that, if switching DNS servers is an easy workaround to keep access to porn, kids interested in it will quickly learn how to do so, trading recipes and even downloaded content directly. Ditto with Tor etc.

The fundamental problem here is that it is an attempt to censor something for which there is huge demand among the very group that's being excluded. The only way you can do so that would actually work is full-fledged panopticon, where all communication channels are pervasively monitored.