To acess fairly what happened, yes John did get beat on a bit after he posted. I wish it didn't happen. Also, people quesioned and challenged his post in what I feel is in an appropriate manner.
As far as being 18 and being able to leave...I will just tell you my personal story.
My stepbrother was 18. Mrs. Peterman told him he could sign himself in for three days and then if he didn't like it, he could leave. I came onto the front row on his third day and they sat me three people down from him. I leaned all the way forward and said to him, "this sucks man". He said, "it sures does, Im outta here". Now, keep in mind he was a shy polite kid. He politely raised his hand, a junior staff member came over to him on the front row, and he said "Im ready to leave, my three days are up". The junior staff member started laughing. About 10 minutes later, they stood him up and chewed him out.
He got out...but it was 6 months later.
The notion that you could leave is an utter fantasy.
I myself participated in several "take downs", one of which resulted in a kid being thrown to the concrete and bloody. Another got piled onto in my front lawn by several old comers. There are more instances but in actuality, anyone making the claim that the seed was voluntary for anyone in the early 70s is just masturbating their own memory.