"These keys are X" (for each type of metadata flag).
If a given user keeps their metadata keys operationally separate from their full ID, and also updates them at random intervals, then it would be possible to have unique 'cards' (of sorts) for each given type of check.
The locality specific checks imply outer levels, obviously, but different keys might still be desired and it would be best practice for all to keep different keys to make it harder to de-identify by virtue of being one of the paranoid users.
To be clear, in a world where people still haven't solved password security, you're proposing a solution that has people generating multiple functionally composable metadata keys in order to retain anonymity on an otherwise massive public ledger?
The original problem is that it's too easy to make fake comments on a basic website. You're talking about users keeping their metadata keys "operationally separate from their full IDs" and "updating them at random intervals." How did we get here?
Yeah, that's not even the hard part for the average user...
How could (should?) they use these things securely? You need to trust the hardware that's handling the keys too.
I can't escape the need for something like a no-closed-blobs dongle that /only/ does digital wallet stuff (and maybe storing files) which MUST have at least a method for the user to read the text of what they're signing, and if it has that use that to also control the 'presentation mode' of that device to the attached system.
