A couple of years ago I read an amazing article in Rolling Stone about fast food -- about french fries and the effect that fast, cheap food has had on the way people eat and work.
He has completed a book on the subject entitled "Fast Food Nation: The Dark Side of the All-American Meal." I'm guessing it will be pretty shocking.
There is an interesting interview with him at The Atlantic Monthly's Web site (link below).
A passage from the book (quoted for review purposes):
"The safety of the food seemed to be determined more by the personality of the manager on duty than by the written policies of the chain. Many workers would not eat anything at their restaurant unless they'd made it themselves. A Taco Bell employee said that food dropped on the floor was often picked up and served. An Arby's employee told me that one kitchen worker never washed his hands at work after doing engine repairs on his car. And several employees at the same McDonald's restaurant in Colorado Springs independently provided details about a cockroach infestation in the milk-shake machine and about armies of mice that urinated and defecated on hamburger rolls left out to thaw in the kitchen every night."