I'm in the
good movie camp on this one.
You see, yes, the characters acted amorally, but there was a lesson as well. Everything that happened could have been avoided, but the situation got out of control. The over the top nature of what happened was a logical side effect of the characters' actions. As a black comedy, it explored the limits of human emotion and actions.
It was also an incredibly funny movie, while being simultaneously deeply disturbing. Movies don't have to be all happy and in line with your morality for them to be good and enjoyable or rewarding. Schindler's List was a good movie and I certainly didn't think the Holocaust was a good idea. Art should challenge you and make you a little uncomfortable This movie certainly does that. After seeing it I realized mostof the people who didn't like it probably didn't like it because it made them feel icky.
I think I'm going to show it at the next bachelor party I host.