This kind of upsets me.
Let me start out by saying I'm 14 years old and I've never done drugs.
I can tell you what these people were like because I was also at that concert.
For one thing, everyone that I saw seemed to be having a good time. I saw the security guards (politely) ask only two people not to film.
Sure, the message in Country Joe's song is about Vietnam, but as he said before he went into it, "Some things are very different nowadays, while some things are just the same..."
I do realize that some of the audience members didn't truly believe in the message of "peace and love," and were probably only there to hear the music of their youth, and there is anything wrong with that either. On the other hand, I saw countless people who smiled at everyone, made pleasant conversation with strangers, and were obviously having a great time. Does it really matter if they did/do drugs or have forgotten what they believe in? No! Because they're still alive and enjoying themselves.
Though of course you can expect someone so young to focus on something so trivial as the appearance of the audience members, and not on the music that you paid to see...
And about the musicians - wouldn't you be a little cynical too if you were asked to play at a THEME PARK after 40+ years in music?
Lighten up, please.
Ha ha! Good point!