My 6-year-old was sobbing when I picked him up from school yesterday. He held his arm over his face as the teacher lead him to the door. I thought to myself, Oh, no. What happened. Did he curse? Did he say something inappropriate to another student? He is generally a well behaved child, but with a 13-year-old brother and YouTube you just never know. I told my children they aren’t allowed to watch YouTube unsupervised. It’s not like Saturday morning cartoons. A cute stop motion animation Lego video can end with a figurine saying, “Mother f*****!” or soft core porn. Oh, Davey. It turns out my son didn’t do anything…