Headline news: children infiltrate the universal adult one time password scheme for porn, parents panic! Turns out the 18 year olds started selling access to their younger friends, who resold it to their younger friends.
But, for some reason, little twelve year old Jimmy obtaining access to porn evokes some kind of far more visceral reaction in Jimmy's parents (or if not Jimmy's parents, some "busybody" who wants to "protect all the children") than Jimmy managing to get himself a pack of Salem's or a Pabst Blue Ribbon tallboy.
Because right now there's next to no barrier to access compared to Jimmy getting himself a beer. If you keep saying "Your proposal sucks because it isn't perfect and we should do nothing" then you're essentially surrendering to the people who really want facial scans.
Now I’m trying to convince people that identifying adults won’t work either, because kids will still get around it. All the while, we adults live with the negative externality of no longer having anonymous communication. Woe betide us all should this come to pass, but I guess desperate people are how bad things like this tend to happen.
This sort of pedantry is really just supporting the opposition.
Design a scheme that equips parents with better tools to be better parents, rather than one that reduces the scope of parenting responsibilities.