[Symbiote]

In Britain they proposed an anonymous system for checking age before viewing pornography. (It was cancelled.)

The idea was you could show your ID to someone qualified to check (like a shop selling alcohol), they'd give some sort of pass, and that could be used to access the website. I wouldn't mind that, so long at the shop person only looks at the ID.

(And I've never been asked to scan a passport when booking a flight.)