given that governments are now starting to make certain protests illegal, definitely not as bad as having your face in a database and your behaviour being mapped for suspicious illegal activity like criticising genocide.

You're right and I'd go a bit further: It's none of their business what your age even is, they need to know only one bit for their legal duties, over or under age of majority.

Basically what is really needed is a certificate of majority digitally signed by the government bound to some identifier, email address or full name. All this uploading faces or ID card scans is ridiculous.