Please refrain from flaming smokers too much, because they are humans too.

I think smoking is a very unnecessary and bad addiction.
And you can't just blame it on your being addicted, because you can stop smoking if you really want to.
Heck, my grandmother stopped smoking at once five years ago, and she had smoked for more than 30 years.
She was really scared when she saw a picture of the lungs from a smoker, and then she decided to instantly quit.
She quit at once because her willpower was strong enough, and this goes for all kinds of addictions.