The thing is, parents get incredibly conflicted messages about this. When a child DOES end up looking at something bad parents get all the blame for not supervising and controlling their child and get called abusive. If they supervise and control their child they get called helicopter parents or abusive as well.

And it's not only regarding the internet. When parents let their children roam, for example, the neighborhood and something bad happens, the parents get the blame and called abusive for letting their child roam the neighborhood. If they control outdoors time for they child, they are abusive again.

It literally doesn't matter what you do as a parent, a lot of people will call you a bad parent or an abuser for it. I believe it is one reason why some people don't want to have children at all. It's basically an impossible task.

To be honest, Black mirror is not a prophecy. It merely is a speculation.