Must be interesting with other "sinful" activities, "I'd totally let you do cocain but shoot the government won't let me!".
Guidance is a responsibility of parenthood.
When I went to college I was fine. I developed a new social circle quickly, and didn't end up becoming a drunk or a druggie. Sure, I did many of the things my parents never would allow me to do, but it was fine.
I totally get that some people end up in a worse place than I did, but that's not an excuse for blanket governmental bans on things. But I would absolutely 100% support any parent that decides to deny their children any and all access to social media. That shit is cancer, and IMO is worse for developing brains than nicotine or alcohol.
I hesitate to present such a hard line on social media, when I'm kinda "whatever" on teens seeing some porn. The problem is that I see what social media does to adults with fully-developed brains, and I start to feel like social media is akin to heroin: no amount of it is safe, for anyone.
A more relaxed view might be to give teens access to social media, but only in a supervised setting. Parents should be monitoring what goes on with their social media accounts, and have frank (but calm and non-judgemental) discussions with the kid whenever anything concerning comes up. Also parents need to find a way to impress upon their kids that social media is not real life, and that people present whatever slice of their lives (often an unrealistic rosy picture) they decide to paint. And then there's all the misinformation and echo chambers, and... ugh, yeah, no, just don't let kids on social media.
It's not about icky. If you autocrat too much as a parent your kids will simple resent you and once they're 18/left home they'll do whatever they want now that you're no longer around to control them, because they never learned any self control. Like US college kids going all out with drugs and alcohol.