> It genuinely doesn't seem like any more of a threat than age-gating Playboy at the bookstore
If it was really like that, I would have no problem. Simple ID check, in-person only, that's never stored anywhere.
I've proposed this several times. Age-gated websites (social media, random forums, adult websites) should require a one-time use code or token that expires once a year. The token should only be available for purchase at liquor stores or tobacco stores - someplace they check your ID on pain of losing their license. It should be reasonably priced.
Sometimes someone might resell a token they purchased to a minor. Those people should be actively hunted with sting operations and prosecuted.
There's no good reason to make age verification on the Internet more stringent than age verification to buy alcohol or tobacco. Alcohol and tobacco kill far more people.