No matter how many different ways it is said or how many different places it is posted, people are still ignorant to the fact that smoking can kill them. It may not be that they do not know it is more along the lines of choosing not to care. This comes from the fact that the cigarette is a drug and that it is very addictive. You know it is bad for you and yet you continue to be drawn into the need to try and eventually become hooked on the stress relief and the pleasure that the cigarette is providing. It is a matter of being able to come to the reality that these things are bad for you and will in the long and short term kill you.
However you do not realize just how bad that 2 minutes of stress relief can be. Whether it comes in the form of emphysema, cancer or just overall poor hygiene, you need to look at the big picture. There are so many bad things that come about from smoking whether it is the need to carry around an oxygen tank or the need to have a walker because your lungs are so weak, there really is no amount of pleasure that it provides that could ever outweigh the negative aspects of smoking.
Just the treatments that would be needed if you were to develop any type of cancer as a result of smoking should be enough to keep people from wanting to inhale, however it is not. This is because it is a drug and therefore much like the side effects of smoking it in itself is a disease. It is an addiction. This means you will need to find the right cure for it or an alternative means of relieving stress before you are able to quit the nasty habit in the first place.