The cons, to most people, definitely outweigh the pros. The biggest cons would have to be the health issues that are associated with smoking. For example, lung cancer, liver failure, mouth cancer, gum disease, blackened or yellowed teeth, bad breath, the list goes on and on. Another big con would be the effect on family members, especially young children. Being exposed to second-hand smoke constantly is just as bad as being a smoker yourself, and in some cases, it could even kill the person, without them ever having touched a cigarette themselves.