The following is perhaps a little far afield, but it's an interesting subject.

As I indicated above, the fact that someone's religion/morality prescribes certain behavior for them that no one else should question, in no way means that they should expect (let alone compel) others to abide by the same precepts. However, that's not the same thing as saying "if I choose to do something to or for myself, why should that concern another?" There are many things you can do to yourself that DO affect others. For example, if you drive while intoxicated, the potential effects on others are obvious. If you decide to smoke tobacco, there is an excellent chance that those of us who do not smoke will have to contribute to the cost of your treatment for lung cancer, whether through increased insurance premiums or taxes for government-funded programs like Medicare or Medicaid. If you are overweight, you are increasing your potential morbidity from innumerable conditions - including likely MGUS progression - which, again, the rest of us may well pay for. The same applies to use (and certainly overuse) of recreational drugs.

None of this means that there should be laws prohibiting excess weight. But there are of course laws prohibiting intoxicated driving. There are laws prohibiting tobacco use in certain places, and discouraging it (think high taxes) across the board. It's a matter of line-drawing. And, wherever there is a line to be drawn, there will be disagreement about its placement.