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Australia bans social media for under 16s
(www.theverge.com)
This is a most excellent place for technology news and articles.
There is no published science definitively proving that it is harmful or helpful. The effects of this particular legislation, if it is impactful at all, remains to be seen. I'm just offering my opinion based on my personal experiences. I expect it to have some success in reducing acute adolescent mental health issues. If the matter is ever settled through consensus, I'll defer to that.