Sue the supermarkets, not the fast food companies. If there is nowhere warnings that the abuse of food (eating too much, too junk, or any eating disordered behaviour) is bad for you, I really wonder why no obese have sued Jewel for selling him junk. There's nowhere in there mentions about eating 30 jars of peanut butter a day potentially being bad for you.
This diabetes thing is about the adult form. Which is common among the fat elderly. Keep yourself healthy, fit and in not too high weight and you are less likely to get that (and avoid too sugary things). The more the people get older .. and fatter, the more normal it is there are more adult diabetes patients. Force the people to exercise! You don't need the cad to go somewhere 200 feet from home.
Another thing not addressed in tthe juvenile diabetes. Tehorically you can't do a lot about it. In practise most places where the juvenile diabetes (and osteoporosis too) are frequent, use A LOT of dairy products. Make the kids drink a lot of cow's milk so they can have healthy bones .. and nobody makes the connection about increased allergy rates, juvenile diabetes, (and even osteopososis; e.g. in Scandinavia the average calcium intake / person / day is 1300 mg; in India it's around 300-400 mg. In India there are far less osteoporosis and bone problems, thus drinking the cows milk on adult population does not have the effect it according to the milk industry advertising has), ear infections etc etc and the milk. Human babies need human milk, cow babies need cow milk. Adults don't. There are a lot of other sources for the older-than-infants for the calcium; sesam and sunflower seeds (really high), almonds etc, vegetarian 'milks', dark green vegetables, cabbage...
I was forced to drink milk as kid. So were my parents. Despite all family, especially on dad's side, being extremely allergic to milk (allergic, AND poorly lactose digesting).