alt Hacker Newswhy 'silly' conspiracy? Many cases of documented conspiracy in the past anyway.
Being on this social media (YC) people aware it's all about implementation and we should at least demanding better solutions. If you want to regulate/limit access of kids to social media just make that you have to be 16 years old to buy simcard - in many places in EU you already have to show ID to seller.
Allow parent to buy simcard to their under 16 year old children if thats what they want to and allow parents to decide at their home wifi if kid should have access to social media or not.
For the first part -- silly because there's literally no evidence presented of a conspiracy. No connection between the individual agents and actors. No motivation given for the underlying commonalities. And most importantly, for this "scale" of conspiracy, there's no suggestion that other avenues towards the same nefarious ends are in progress. It's just a bunch of countries and organizations proposing similar laws based on concerns, that while (at least to me) are exaggerated and overstated, are nonetheless well-documented, reported, and widely believed in good faith.
As for finding a technical solution, jury is still out but I am unconvinced that it is possible to have a solution that a) prevents children from using an online service, b) allows adults to use the service, and c) does not identify the specific adult who is using the service. You proposed solution is no exception.