Could you be more specific as to what you're imagining? I don't personally see a way to verify someone's age which doesn't involve either credit card verification, photo id verification, or some sort of facial recognition. If you know enough about someone to verify their age—even to a relatively low degree of accuracy—you probably know enough to pinpoint who they are in general.
Heck—in most cases, we can't even tell the difference between humans and bots anymore! And it's true that we basically accept that some bots will slip through the cracks—but identifying bots also strikes me as significantly easier than identifying children.
Heck—in most cases, we can't even tell the difference between humans and bots anymore! And it's true that we basically accept that some bots will slip through the cracks—but identifying bots also strikes me as significantly easier than identifying children.