[taxyz]

There's nothing preventing us from the law requiring the same for online verification. It doesn't have to be the case that Facebook or Twitter or whatever store any information other than at some point they did verify your age.

As to the other information, you're more making the case that online tracking should be illegal (which I'd agree with). For the majority of people, they are either unaware or uninformed about how to prevent online tracking to a sufficient degree. If you're signed into your Google and Facebook accounts and then surfing the web, theres a good chance you're getting caught up in cross site tracking. Hell, even if you don't have accounts explicitly, its not like Facebook isn't tracking non-users. In the real world, stalking is illegal.

Also, in my state (Washington), IDs now have barcodes on them. When I buy beer at the store, the clerk doesn't even look at my ID; he/she scans it and thats it. I'd hope the information about what type of beer and how often I buy it isn't being stored somewhere but I'm just hoping.