I'm not looking through 7 pages to get to check, so I'm sorry if this has already been posted.
Super Sized Fast Food Phobia [http://skeptoid.com/episodes/4088]: by Brian Dunning
Basically, it seems that that documentary used bad science (that could not be replicated) to draw too broad a conclusion about fast food. Other, better studies have since overturned his conclusions. As always, the danger comes from over-eating, not the fast food itself. That's about as good as any other kind of food you're likely to buy, and it's not the deciding factor in childhood obesity or anything like that. I think people overestimate the harm in fast food.