> Age verification is the most obvious solution but comes with the downside of potentially leaking private adult activity or information.

Honestly the older I get, the less I can strongly care about this. For better or worse, porn is a relatively mainstream topic. If we can't have discussions about why porn taste is so potentially devastating to leak, we don't deserve privacy.

Besides, it's not like "leaking" of this information would lead to a public index of who is watching what. And maybe it should, I'm no longer sure.