I'd rather have my heroin addicted son do it at home, where I can be there to take him to the hospital, talk to him about it, etc., rather than make him go out into the streets alone. Banning it doesn't seem like a productive approach
Banning substances dramatically decreases use: https://link.springer.com/article/10.1007/s00414-015-1184-4 and legalized opioids dramatically increased heroin use: https://www.tandfonline.com/doi/abs/10.3109/15360288.2015.10... Access matters.
The question is always: A. What do people use instead? (banning pot, for example, increases use of heroin and alcohol, which is good for alcohol companies but bad for public health. If banning social media sent kids to 24/7 news channels, it might not help, but I haven't seen evidence of that.) B. How much is organized crime funded by the increased black market? (In this case, kids are a limited population that doesn't have a lot of money, so the answer is probably "not much".)
Nanny state! Let him take himself to medical facilities, and deal with the consequences himself instead of interfering
HELL Let's ban hospitals, they're just interfering in the natural order of life.
Real talk: I know that those are strawmen and you most definitely think that where you draw the line is right for you and your family (assuming that you have one), but the reality is that the line gets moved a LOT as children grow - your line might be great if you have developed a good relationship with your son, and he's received a good social education from his friends/network and he's over a certain age.
It fails very quickly if he's, say, 5 years old and/or he's had no friends that model good/bad behaviour and/or you and he are human meaning that communication, interpretation, and any hint of resentment lies underneath (keep in mind that teenagers are geared to fight/be angry/dislike their parents, for the specific reason that it motivates them to leave home and begin their own lives)
> I like your libertarian approach.
Their idea is to prohibit government...
What we are seeing in Australia is a community that has decided that the best course of action is to say that children under the age of 16 are generally too young to have the skills to deal with some social media.
You yourself are comfortable with the idea that a 5 year old is far too young for social media (and kids that age /can/ work devices to access social media if they want)
The question really is, at what age should we draw the line.
16 is arbitrary, but the ones most able to manage the interactions are the ones that will have the skills for circumventing the blanket ban, and the ones that aren't that savvy, won't.