The only places that seem to be doing well with teaching about sex are those that are not all too concerned about teenagers having sex. And places that do a good job teaching about drugs seem even rarer

I'm all for teaching about social media. But if that is supposed to have any success it should be more like teaching about politics and literature than like teaching about drugs and sex. Give them literacy, discuss which motives and forces are at play so they can see beyond the obvious and make good decisions