He's right about one thing, watch what you and your kids eat instead of blaming fast food/the government/etc.
And that's why I hated Supersize Me. Entertainment-documentaries are toxic to today's societies because they spread half-truths for money. If a person's going to eat a 1000+ calorie meal three times a day, of course they're going to get fat.
McDs once in a while isn't going to hurt your overall health. In fact, increased caloric intake isn't as bad as lack of exercise.