Isn't this the logical end goal of basically every approach to "age verification", though? If you really want to control access to the internet, then you can't let people have a VPN or Tor, and if you don't want people to VPNs or Tor then you need to lock the device down.
AFAIK you don’t need ID to buy juice, sugar, and yeast to make your own alcohol, so I think it should be the same for computer parts.
I and pretty much everyone else in my childhood TeamSpeak server did at roughly 14 years of age.
Maybe for the next few years you'll be able to do that. Analogy: back in the day you could just build your own airplane and fly it around. There were no regulations.