Forbes points out several well, let's call them not-so-factual idiosyncrasies in Michael Moore's film Bowling for Columbine:

TITLE: Moore titled the movie Bowling for Columbine because, he suggests, the two kids who shot up Columbine High in Littleton, Colo., went to a 6 a.m. bowling class on the day of the attack.
ACTUALLY: Cool story, but police say it's not true. They say the shooters skipped their bowling class that day.

MISSILES: Moore wonders whether kids at Columbine might be driven to violence because of the "weapons of mass destruction" made in Lockheed Martin's assembly plant in Littleton. Moore shows giant rockets being assembled.
ACTUALLY: Lockheed Martin's plant in Littleton doesn't make weapons. It makes space launch vehicles for TV satellites.

WELFARE: Moore places blame for a shooting by a child in Michigan on the work-to-welfare program that prevented the boy's mother from spending time with him.
ACTUALLY: Moore doesn't mention that mom had sent the boy to live in a house where her brother and a friend kept drugs and guns.

BANK: Moore says North Country Bank & Trust in Traverse City, Mich., offered a deal where, "if you opened an account, the bank would give you a gun." He walks into a branch and walks out with a gun.
ACTUALLY: Moore didn't just walk in off the street and get a gun. The transaction was staged for cameras. You have to buy a long-term CD, then go to a gun shop to pick up the weapon after a background check.