Alton Brown says it pretty well in his latest rant/blog after seeing Supersize Me!.
We are fat and sick and dying because we have handed a basic, fundamental and intimate function of life over to corporations. We choose to value our nourishment so little that we entrust it to strangers. We hand our lives over to big companies and then drag them to court when the deal goes bad. This is insanity.
Is MacDonalds food bad for you? What do you think? Does that mean you shouldn't eat it? No, it just means you shouldn't live on it or anything else made by someone you wouldn't hug.