Parents won't parent without a change in incentives.
That's why giving children access to social media must be punished to the same degree as giving children heroin. If it's a parent's responsibility, it must be made a parent's liability. Anything without the full threat of the government's monopoly on violence is just a pretty slogan. We should see access to social media as the neglect that it is.
[dupe] Discussion on associated blog post: https://news.ycombinator.com/item?id=48706560