Mob Mentality.....would you join in?

There is no human quality quite like joining groups. For example; do you belong to the Democrats, Republicans, or Independents?Were you raised in the following faith communities Catholics, Protestants or Muslim? Are you single, married, or divorced? Does someone call you a mother, father or a grandparent?  Which group do you wave a banner for Pro choice or Pro life? Do support or oppose Bruce/Kaitlyn Jenner's transformation? You see what I mean, we either feel safer (physically, emotionally or spiritually) in large groups or want to stand out in small groups (a big fish in a small pond is not the same big fish in an ocean.)
   Sometimes the choice to join a group can happen in just a few seconds, with drastic consequences.  The following story happened on Labor Day weekend in the Circle of Orange during the International Street Fair over thirty years ago. It was hot.  Not just regular California Labor Day weekend hot this was like Africa Hot.  My girlfriend and I had been walking around the food and craft booths for about thirty minutes.  We were sweating and uncomfortable.  I made the executive decision to go to a friends apartment overlooking the Circle to get a few minutes in the cool air conditioned apartment.  We buzzed Don's apartment and he was excited to let us in.  Don and his wife had only been here a short while and were enjoying showing off their new home.  
    I walked to his window over looking the street fair and asked if I could open it and peek outside.  The building was built in the twenties and a lot of fixtures were very old including the window.  I  pulled up on the window and let go (assuming it would stay put, not knowing it required a stick to hold it open.)  The window came down with a crash and all the glass fell down to the street below.  Worried that someone got hurt I quickly looked outside and saw everyone was unharmed.  For some reason I screamed out, "Who threw that rock?"  There was six people right below us standing around reviewing the broken glass.  One of them was a young man who was a punk rock fan (dressed in wild clothes with colored hair sticking up and pointing in different directions.) The five other people all pointed at him in unison.  He ran off as fast as he could.  I could hear some of the five yell, "Stop him."  No one did. He got away as fast as his legs could take him.
    I will always remember that day and the choice everyone made, wondering if I would have joined in?