> as the problem seems to be general conduct in social media

is that the problem? I'd have thought the problem is more about the ill effects of social media on children, not the children's behavior on said social media.

Hen or egg? To make it worse, for some it's simple in their nature to show some degree of anti-social behaviour. We all have to learn how to interact with others in a social manner, be it on the playground, school or internet.