I have to say, the movie was actually quite watered down in my opinion, and the director mentioned that it was intentional as well. It seems he didn't think it was believable enough if he was too graphic in its depictions of what happened in KIDS. I have to say that I think I agree.
Anyway, even watered down, I found it very difficult to watch. I went through "Kids of the Canadian West" which is a bit different from how Kids of Bergen County was. But it still really, really affected me. When I was in the place I was in, I used to scratch at my arms and legs until they bled - I couldn't help it. I hadn't done that since I got out almost 5 years ago, but while watching the film I started doing it without even being aware of it. When I got out of the theater my fingernails were all bloody. This film is powerful. Great job!!!