The social ostracism and inability to interact with their peers will not strengthen your children socially nor given them a value system for dealing with the ch

The social ostracism and inability to interact with their peers will not strengthen your children socially nor given them a value system for dealing with the challenges of the culture around them. It will simply delay when they have to grapple with it from a time in their lives when mistakes are understood and expected by the world to a time when the world will expect them to already be experienced with how to manage it. A rule like you describe is not for the benefit of your children. It is a crutch designed to help you avoid the hard work of having to teach proper values around difficult things. Charting a path through social media is part of parenting. You haven't found a secret hack that makes it easy. You have created a fantasy that you can simply get away with not doing so.