[voxic11]

Zero knowledge proofs are better than this "bearer token" proposal because all what is needed to unmask an account is for the shop to note down the name on the ID and the code that was given to them.

[triceratops]

I already wrote "no record keeping" in my first comment.

Shop at stores that don't do that. If that doesn't work write it into the law that they aren't allowed to record your ID.

For alcohol and tobacco, stores don't even card people that obviously appear to be legal age. So most people won't ever show any ID to a clerk.

I've been buying alcohol since turning legal age, in multiple countries and jurisdictions. Never had my ID scanned or stored.