I just returned home from the Aug 19th concert at Ontario CA.  I was so looking forward to another outstanding concert.   The Dylan groupies that I had the misfortune of sitting next to were not a credit to his fan club.  I will forever be a Mellencamp fan, however, I would never act in such a manner as to be a discredit to the rest of the fans.  What a huge disappointment.  I had a 3rd row center ticket and ended up leaving after John;s concert was over.