A friend who works in the concert industry wondered why the crowd at Woodstock had gotten so upset. They knew the ticket price before they got there. A much closer parallel is the 1992 rebellion in Los Angeles. It's one thing to be in a disaster area, like the first Woodstock back in '69, where facilities are overstrained or nonexistent.
People instinctively pull together.
But the crisis at this year's Woodstock was completely artificial. There was plenty to go around. Under those circumstances, people do react with fury. That's what the looting and trashing, especially the smashing and theft of the festival's ATMs, was all about. Because they aren't used to being sucked dry, these rock fans rebelled after just three days of such treatment.