Obesity and smoking are two very different things. It only hurts the person who is over eating physically and there isn't that much a strain on the other dimensions of overall wellness to make a difference. Obesity can be reversed, but the effects of smoking cannot. Permanent organs like the heart, brain, and lungs will never heal or replace tissue with new tissue, only scar tissue which inhibits the function of the organ. So, I do think an outright smoking ban is and should be the governments decision. As it does harm innocent people easily. Both obesity and smoking are catalysts to heart disease so as far as both being harmful it's the same as they both have terrible consequences, but smoking definitely affects the environment more so than obesity.
Krista