This is a tough one. In a way, I agree more or less with all four answers.
It’s fine- as in I don’t really care what you do and I’m not so sensitive that smelling somebody’s smoke from the chair ahead is go8ng to throw me into a panic. You’re not my kid so do what you want.
Do whatever you want- ditto the answer above. I don’t expect you to care what I think about you.
It’s rude- yeah it is. Even though it’s not the end of the world, it’s rude to make other people smell your cigarettes.
Makes you look like a total douche- yeah it does. I’m sorry but it does. After all these years and all the research, the nicotine patch, the pictures of diseased lungs, you should do whatever you have to do to quit smoking. In the grand scheme of things there are many douchier behaviors out there and I do have sympathy for people with addictive tendencies but I think we have to admit it’s on the douche spectrum.
"You want your skis? Go get 'em!" -W. Miller