If people stopped buying cigarettes there would be no tobacco industry. But the true cost of smoking is not something that the smoker realizes until it's already too late. That's why we had to have huge public health campaigns to deter people from smoking, because the long-term effects aren't obvious when you're just stopping in at the corner store. We all live in our own little bubbles and it's often difficult to see how our actions, individual and collective, shape the world around us.