What about non-mainstream social media? What about news services? What do you think would happen if we banned both, those people that get angry and addicted will just be happy and healthy? Or do you think corporations will find another avenue to try and manipulate people, which those people will happily flock to?
Non mainstream media by its definition probably doesn't attract much people and damages would be restricted; I think the most damage happens in crowded echo chambers where a critical mass, assuming there is one, would be easily reached. Yes, very likely corporations would find other ways to exploit people addiction, and educating kids before it's too late is a good move, however I don't expect much cooperation by parents.
I meant parents who are among the grown ups I was referring to in my original post. Kids become addict to social media also because of their absence as parents, and giving bad example.