Making controversial dollars
Fahrenheit 9/11
It's difficult to think of a more controversial release. Michael Moore's blatant Bush-hunt spared no corner as it ruthlessly took on the US President, while angering novelist Ray Bradbury by using a title very similar to his Fahrenheit 451. Either way, 911 won the top prize at Cannes and remains the most successful documentary in history.
External link: The Fahrenheit 9/11 controversy