It didn't do that with alcohol and tobacco in my corner of the world and it was partly because some parents didn't really give a shit. And that's the thing: as

It didn't do that with alcohol and tobacco in my corner of the world and it was partly because some parents didn't really give a shit. And that's the thing: as a teenager if you don't have access to <disallowed thing>, there's surely at least one kid in your class, whose parents are either largely absent or particularly lenient, and who will provide you with whatever you need. In the case of social media I'd imagine a secret separate phone without parental restrictions and SIM card swapped out for the time being. Maybe even a separate SIM card, should the first one be restricted on the provider level. Or just rooting the device and rendering any control moot. There's always this one guy who'll help you out if your parents are too strict in your view. Of course there's going to be some reduction, but you have to ask yourself: what's the plan when the kid turns eighteen and you can't legally control their internet usage - not when they have a SIM card on their name? You just let go of any restrictions on that day?