Check out these related features:

When Bad Movies Happen to Good People: 
Wouldn't it be swell if we were only affected by movies we like?

The Big Lie (or, "style" that betrays "content")
Hypocrisy at 24 frames per second

Oliver Stone on trial:   Some of the most damning evidence
against Natural Born Killers is right there in the original
Quentin Tarantino script that Stone re-wrote

A peculiar disclaimer:  No matter how morally or aesthetically reprehensible I may think some of the movies in this section are, I would never, ever be so presumptuous as to tell readers not to see a movie (well, maybe a snuff film). I don't think that's a critic's job. The way I see it, you can read what I have to say and then make up your own mind if it sounds like something you'd want to see for yourself.  Besides, as one of my favorite film profs used to say, you can probably learn more from watching a bad movie than you can from a good one. A good film, because it works, often appears effortless or seamless. But a bad film usually calls attention to its failings, manipulates you obviously and unfairly, or simply falls apart before your eyes and allows you to examine its innards to see what went wrong.