I agree - the girl was not culpable - but the parents certainly are.
Telling a 14 year old girl that she is free to attend parties where people do drugs and that she can stay out until 3 A.M. is tantamount telling her: "You have zero value to me and I don't much care if you live or die."
They should be prosecuted for neglect.
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Maybe the parents thought they were being tolerant and generous? From what I've heard of being a parent, it rips at their souls to see their child suffer.
Rules never made sense to me as a kid, especially since they seemed arbitrary. But if rules are explained in the context of love and protection, they would be easier to take.
I'm a parent and I would be absolutely derelict in my duty if I allowed either of my daughters to be out at a party where people take drugs until 3 in the morning.
It has nothing to do with generosity or tolerance - a 14 year old is not capable of making mature decisions in these circumstances.