I'm not seeing the need for all the McDonald's bashing in this thread.
If you don't like McDonalds, don't eat there. It's that simple.
I do know, however, that a LOT of adults do enjoy McDonalds as do their children and Disney has always been about making their guests happy.
I also know, that as a former U.S.D.A. Food inspector, (for 10 years) McDonalds food is MUCH healthier than a LOT of other choices people make in the parks ie Pizza, some of the decadent Pastries in France and Norway, and the greasy Fish and Chips in the UK pavillion just to name a few.
I'd also be willing to bet that the burgers in McDonalds are healthier than the ones found in Pecos Bills, Cosmic Ray's or The Electric Umbrella at EPCOT Center.
McDonalds has strict rules about what goes into their burgers and I can tell you from experiance that their burgers contain less fat than most fast food burgers, and unless you just buy extra lean ground chuck, probably less fat than the burgers some of you eat at home.
As for fries, I bet most people would agree with me when asked, that McDonald fries, when hot and freshly made, are much tastier than the greasy, limp, soggy fries sold all over Disney property.
As for dining at McDonalds, it's like anything else, moderation is the key. An occasional trip to McDonalds is fine, but a steady diet of their menu isn't recommended.