Today, people are eating at fast food restaurants more than ever. I think this is because of the fast-paced lifestyle of today's society. This has contributed to the obesity problem. If these restaurants offered healthier options, and even got rid of some of the items with huge calorie counts, we could begin to address the growing obesity problem.
Yes, fast food chains should strive to provide healthier food. Customers who continuously eat unhealthy food tend to be unhealthy themselves. These customers become addicted to fattening foods and frequent fast food restaurants. Fast food restaurants are responsible for the foods that they feed to their customers and in turn are partially responsible for the health of their customers.
I consume fast food just like most of us, and I have no illusion that it's good for me, but fast food chains should strive for healthier options. Some of us clearly cannot control ourselves, and children should not be expected to. Fast food places should use healthier oils for frying and offer healthier options for eating on the go.
Each fast food restaurant should provide whatever it is that they wish to provide. If people want healthy options, they know where they can go for that (i.e. Subway for instance). But the majority of people know exactly how much fat, calories, etc. are in Big Macs and the like and they eat there anyway, because it's much cheaper and it also tastes good in a lot of peoples' opinions.