This is the kind of worldview that comes from years of navel-gazing in a therapist's office. "Why do I beat my kids? ...Because my father beat me! Now that I understand why I do it, I can stop beating my kids..." Or, you could just stop beating your kids.
It doesn't matter why it happens, it just matters that it happens. But instead of preventing or discouraging kids (or people in general) from using social media, you can blame the ghost of Ronald Reagan--the gift that keeps on giving.