The social media ban for under 16s is interesting as it feels like a low-stakes admission from government that social media use can be highly problematic.
The reasons for this are in the design of the platforms, and I would argue that it's probably not the under-16s who are most at risk from its most pernicious harms.
I don't think many under-16s were rioting in Southampton and Belfast over the last couple of weeks. That unrest was almost entirely social media-generated. #socialmedia