For most of my life, a “fad” was harmless.  When I was in high school, “streaking” was the latest and greatest thing.  Of course, there had always been fads in clothing; what I wore without shame in college would be considered a costume these days.  And of course, speaking of college – The Pet Rock.  When a joke becomes a fad, there is money to be made.  But like most things in this world – fads are turning darker and darker.