McDonalds is bad for you, it's basically chemicals and sugar of the worst kind. Eating there often is bad for you. But people don't think these things catch up with them. They do when you're 55 and you have colon cancer.
Although the chances are you won't get colon cancer if you eat a McDonalds once a month and a proper healthy diet. McDonalds is an indulgence and a convience - and everybody knows that if you use it as a source for your default meal, you're going to have health problems. We didn't need to see "Supersize Me" to arrive at that conclusion either.
I guess all I'm asking is why you even bothered mentioning this and consequently spawning a really pointless discussion? It's nothing new is it?