Worst movie of all time

What is the worst movie of all time? What should be considered when evaluating what is truly a bad movie. Here is the opinion of Joe Queenan writing for The Guardian. The occasion is the British opening of the Paris Hilton film, "The Hottie and the Nottie," which Queenan argues can't even be in the discussion for the worst film of all time because everyone knows going in that a film with Paris Hilton is going to be awful. The article is well worth reading. Check it out.