I find it utterly frustrating to read the "think of the children" mockery here on HN.
I argue that this is good.
There's many reasons why children having unfettered access to the internet and different campaigners care about different aspects, so I'm going to talk about the one I care about: addiction, destroyed ability to focus, and dopamine desensitization. In the UK (and elsewhere in the world, I imagine) there's a huge problem with people addicted to phones and children are especially vulnerable. I don't care if adults are vulnerable, they have to make their own decisions. But I care that parents that do everything right in terms of educating their children on how to be healthy with respect of phones (like me and my partner) then have to send their children to schools where they're given ipads. It's not fair to say "banning doesnt work you should just not give your children phones", but then force you to send your children to schools that give them ipads and other distractions.
It's a matter of network effects (something that HN loooves talking about). In addition to the fact that phones are engineered to be addictive, you have the fact that in many schools EVERY child is on social media, and so any family that wants to stay away has to decide between isolating their child from society, or selling themselves into the "engagement industry".
I think that banning is a valid approach. It won't be 100% effective, but it doesn't matter. What matters is that it will introduce friction (another thing that HN looooves talking about) and so will reduce the total number on children that is on social media and therefore reduce the social need for other children to be in.
So, we're adding friction to break or weaken the network effects that keep these cancer companies harming children in schools.