here's alternative legislation that should be at least as effective without the mass surveillance aspect:

* as your kid's legal guardian you're legally liable for whatever the fuck your kid does, including but not limited to harming themselves: Parents should care for their kids

* platforms will do their best to not be available to minors unless minors are actually their core audience, will inform monthly how they did that, and the bottom 10% of achievers will pay an escalating percentual of their valuation as fine for each instance where they're found lacking: Platforms should care about kids as a category of people

* posession of personally identifiable information about an unrelated minor by any unrelated person/company without a clear and preapproved reason is grounds for a child abuse investigation on every person anywhere in the chain of custody of said data: Children's PII should be such a hassle to manage it's not worth taking