[m0dest]

Exactly. The privacy characteristics of government ID cards are worse than any other solution. When sharing such an ID, a person is providing several global, stable identifiers (e.g. ID number, full legal name). For adtech and data brokers, this is the ultimate fingerprint for tracking and matching.

In a perfect world, the digitization of these IDs would come with modern digital privacy and security. Scanning your ID number would only provide a recipient-specific ID that couldn't be matched with other vendors. Age eligibility and driver's licensing status would be presented as separate signed attestations that share no other data.

We aren't even heading in that direction yet.