Oscar Wong/Moment/Getty ImagesI stopped posting photos of my son on social media almost four years ago, after my husband and I found out one of his college teammates had been charged with possessing and distributing child sexual abuse material. While we had no reason to believe our son’s photos were part of his cache, the fact that he followed my husband on Instagram made us all too aware that our private profiles still didn’t magically make sharing our son’s image online safe. Sometimes the predator isn’t a stranger, and they already follow you.In the following days and weeks, we went back th...