Smoking is detrimental to your health, but is a life choice. You're not a suicidal idiot for smoking...just someone who disregards your health. Also, if you smoke occasionally, or don't inhale (Say with Cigars or Pipes, like I do) you are still harming your health, but not as much as a pack a day smoker.
While I'm not saying smoking is a good thing (It probably would have been better if it never existed) some people have stress issues that they would never be able to handle without tobacco. I only smoke because I'm going through a divorce, and I probably will stop afterwards...except maybe a cigar once or twice a month. Only for the flavor though...those things are delicious.
I know someone who has an autistic child that probably would have already killed herself had it not been for nicotine/tobacco/etc....so Mr. 13 year old....people don't smoke just to look cool and/or because they're an idiot. A lot get addicted and can't help it...a lot actually can't find anything else to help their problems, and therefore need it. There are many people who were given smokes by their parents or older siblings when they were younger, and became addicted to nicotine, and couldn't stop.
It's very situational. Don't yell at someone for smoking just to look cool, unless you know the person. Then they are a dumbass.
