there is no scientific evidence at all whatsoever that social media causes anything it's being scapegoated for. this fear of social media is a classic moral panic rooted in conservative ignorance that should be resisted by all liberals and all socialists and everybody else on the left. rising conservative technophobia is a serious social problem that needs to be addressed and resisted.
i would rather see a focus on root causes than an attack on symptoms, which would mean a ban on video games, a dramatic change in culture around competitive activities like sports and a crack down on drug use and drug culture.