Giving children control doesn't mean anything goes. There's a huge difference between telling your children what to do and telling them what not to do. The problem is the former i.e. when parents schedule every minute of the day, telling their kids what to do. Laying down the law i.e. forbidding them from doing certain things can set healthy boundaries without telling kids what to do within those boundaries.

So yeah, no social media, no wasting away in front of a screen. They might disobey, but at least it is clear in their minds what the house rules are. Rationalizing permissiveness at home because ostensibly it lets you monitor them is precisely the wrong idea. It legitimizes the activity in their minds through your parental authority and is just another example of parental hovering.

The more widely we recognize the proper duties of parents, the more successful it will be since communities can reinforce the effectiveness of parenting. If all of my kid's parents ban the use of social media, it will be difficult for my child to make use of it at a friend's house.

P.S. Nice nick.