Just go to an assembly and see all the obese JWs there...I doubt that they are all DF'd. Some gluttons are obese and some obese people are gluttons but not all obese people are gluttons and not all gluttons are obese. Bulimic people are gluttons but usually are just normal weight or a little over. Now that can be dangerous physically. I think you are thinking of being "greedy" which is a catchall phrase that some use to DF people. All or nothing thinking is hardly ever realistic. Personally, I would rather have an obese person sitting next to me than have someone blowing smoke into the air I breathe.
Do you mind if I smoke? No, do you mind if I fart...Steve Martin, ex-smoker.