If "diabetes, coronary disease, high blood pressure, high cholesterol" run rampant in certain ethnic groups as hereditary disorders... then is there anyone other than McDonalds that could be blamed for it? Probably not.
McDonalds isn't at fault. I doubt the plaintiffs in those cases can prove that they ever asked for nutrition information. For the past 15 years it's been available upon request at all nation-wide fast food chains. If it were handed out with every meal, liberal environmentalists would be cursing them for wasting paper and "killing trees". Edit: just like they were about the styrofoam containers... and noticed they stopped using them?
Most educated people cook their own food. Survival of the fittest kind of thing maybe? It doesn't matter whether it's fried chicken or a caesar salad. It's still cheaper and healthier than what fast food chains serve. Anyone with half a brain knows that already. I've heard a 9-year old say that before.