Your sci-fi distopia flash fiction is compelling, but not actually on topic in this discussion.

"Think of the children" is weaponized for censorious purposes, but also the harms of social media are well documented (unlike many of the other moral panics fuelled by this phrase). Communication channels are becoming managed spaces, but by private companies not accountable to the electorate, not by the state.

I'm not sure a blanket under-16s ban on all social media is the right answer, but there are really good reasons why people support this that you need to engage with to have a useful discussion here.