If you're banning teenagers from social media, aren't you just creating early twentysomethings with no social media ettiquette cus in their mind, the internet is somewhere you go to misbehave?
Similarly if you ban people from watching porn, aren't you just creating twentysomethings that have no idea how to behave around porn cus they are still in "teenager who knows they'll get in trouble with their parents unless they can blame it on someone else"-mode.
Reminds me a little of a meme I saw about USAmerican young adults starting to drink around the time european young adults decide to quit drinking. I don't think the meme is that accurate, like, factually, but general idea that if you're banning something for young people, all you're really doing is delaying them getting to figure out a healthy relationship with the thing to a later date.