Courtesy of The Common Room, an article at Reason Magazine discusses the demonization of fast food chains like McDonalds.
Fast food makes such a savory scapegoat for our perpetual girth control failures that it’s easy to forget we eat less than 20 percent of our meals at the Golden Arches and its ilk. It’s also easy to forget that before America fell in love with cheap, convenient, standardized junk food, it loved cheap, convenient, independently deep-fried junk food.
During the first decades of the 20th century, lunch wagons, the predecessors to diners, were so popular that cities often passed regulations limiting their hours of operation. In 1952, three years before Ray Kroc franchised his first McDonald’s, one out of four American adults was considered overweight; a New York Times editorial declared that obesity was “our nation’s primary health problem.” The idea that rootless corporate invaders derailed our healthy native diet may be chicken soup for the tubby trial lawyer’s soul, but in reality overeating fatty, salty, sugar-laden food is as American as apple pie.
Eating lots of flavorful food (and remember, flavor=fat, it's fat that carries the flavor) is not new, not even eating so much of it that somebody decides to define you as obese.