Last year there was a week where the students at the nearby school stole all of the faucet knobs, towel dispensers, and even a mirror from the bathrooms. The following week they went about doing random acts of absurd "public service" (a TV was installed in the bathroom, poorly). Why? Some meme, no greater explanation.
If you maintain an oppressive status quo, that kind of thing scares the bejeezus out of you.
And by the way, in the 2000s, before facebook arrived in my country, we created websites and chatroom spawning entire grades, entire school even. The rumor mill was worse than facebook. I've heard of one of those project (a real website, not just an IRC like in my highschool) was used by students of multiple schools, until it was "hacked" and the admin took it down.
It was a bit discriminatory for kids who didn't had enough money to participate, or for groups of kids who weren't interested enough to get on it (i mean, it _was_ geeky) because there was an entry barrier. If we could've coordinate our stupidity amongst all the students, those years would have been even better, and for them too
The only good thing I can see coming out of a social media ban is that hacking will be cool again (much like it was when you had to be somewhat savvy to customize your myspace page).
Learning that it's not you vs your peers, but you and your peers vs the status quo, is an important part of teenagerhood. Attempting to keep kids from being kids is probably a pretty reliable way to remove any ambiguity about who their enemy is.
(Source: Raised in TX, knew people taught both of the things above and learned otherwise thanks to social media. For the record, my parents did _not_ teach either of the above)
Or, more likely, when you look back at yourself as a teen do you cringe at what you believed?
My sisters are way more aware of the world than I was at the time, for instance. But if you talk to some younger people, you'll find that things are different than even a decade ago for younger people.