Everybody has his own habits, and smoking is just one of them. Just being a smoker does not make you guilty, but it is significant that their smoking is having bad effects on many non-smokers.
Smoking is a person's habit.
Smokers have the right to smoke just as non-smokers have the right not to smoke. What I'd like to say is that smoking is okay, but smokers should know when and where they can smoke. People are arguing whether smoking should be allowed in public places. I think it should be allowed. It is not hard to have that place in theaters, restaurants, shopping malls, and many buildings.