Smoking can kill you. That's why I don't smoke, and it's why you shouldn't, either. There. I've just done the only things that should be done in a free society to stop people from smoking: I've told you that it's dangerous, I've urged you not to do it, and I've even set a good example. If you'd like other people to be healthy, you should also discourage smoking, too. But if you'd like to be free, and you'd like your neighbor to be free, that's all you should do. It isn't my business to come into your home or business...