A predictable ending.

A lot of people have commented that this film's ending is a shock and a surprise because essentially the 'bad guys' win. I didn't find the ending a surprise at all. We'd been set up all the way through to think the worst of these people, the kids and their parents, and that they'd be capable of anything, so it wasn't a surprise to me that the adults did what they did at the end. What would have been a surprise, and a brave piece of film making, would have been to have the adults turn out to be decent people at the end and actually do the right thing (call the police etc...) and even have Brett's dad defend her against the other's revenge. Instead the director takes the easy way out and has them conform to the stereotype he'd set up. It would have wrong footed the audience to have not blamed their upbringing to explain what the teenagers did. In life there are no easy answers for the things people do, and just blaming the parents was the most obvious and least intelligent ending in my opinion.