Social media age verification is like none of those - social media is the modern public square and age verification is asking everybody to show their papers before participating in free speech in the public. It will have a chilling effect on free speech and will be a tool for authoritarian control
A poor analogy.
The public square has never been properly anonymous. If you start saying things which contravene laws or the rights of others, the police have been able to capture you and unmask your identity, if concealed.
Was there ever a public square where children could participate anonymously among adults? (I’m imagining three Dickensian urchins in a trench coat giving a speech in Hyde Park.)
The public square was in communities small enough where townspeople knew each other, and so speech was not anonymous besides those who penned (but not those who distributed) unattributed pamphlets. Moreover, if the speech you were pronouncing was beyond the pale of the community’s values, you could face retribution for it, whether judicial or extra-judicial like tarring and feathering. Even in the nascent USA whose political elite was high on Lockean ideas of natural rights and freedom of speech, the public square was never a free-for-all.
Social media as it has become now is a shitshow where a minority of angry and/or disingenuous posters dominate discourse.
Twitter (X) was never the public square, and now it's little more than a playground for propagandists. The rest of us do well to ignore it, and it seems that even the 'legacy' media are starting to realise the days of breathlessly reporting on tweet-storms weren't great for anyone.
Your local library has age and ID requirements.
Your local 'town square' has 'some rules'.
Parents are entirely able to overcome any of this if they so choose - including feeding their kids alcohol, guns etc. - and so the freedom does materially exist.
Social Media isn't a place for free expression - it's mostly toxic - like exposing your children to the most vile, inauthentic people.
The more genteel places, frankly, won't have much in the way of age restrictions.
Entire nations are banning social media for kids because it's just not healthy - the teachers want it, the parents want it, the data seems to support it.
I think you're right to be (very concerned) but this is a necessary discussion. As a teacher.
Social media, as we have it today, has nothing to do with a public square.
A public square does not have trolls and bots from across the globe teleporting in and out. A public square does not amplify the most divisive comments and drown out your friends's holiday photos because the former makes the ad space more profitable.