I was surprised to find out that ******* gets censored everywhere.

You’ll love the way we do tyres then. Two of the dimensions are metric and the third is imperial.

What flag is that?

It looks similar to an inverted Union flag but one of the red stripes is in the wrong place.

Not a cryptographic expert by any means but maybe something like this would work. This’d be implemented in common places people shop: supermarkets for instance. You’d go up to customer service and show your ID for visual confirmation only; no records can be created. In return the service rep would give you a list of randomised GUIDs against which the only permissible record can be “has been taken”. Each time you need to prove your age you’d feed in one of those GUIDs.