How is my lighting a cigarette "a blatant disregard for others" any more than :

A) Talking on a cell phone in public.
B) Walking my dog (some people absolutely loathe dogs).
C) Listening to my headset too loud.
D) Talking to my friends too loudly.
E) Walking too slowly.
F) Whatever miriad of other things someone else is doing that might annoy you.

I'm not saying you should act like a jerk. I'm saying you should cut people slack, because believe it or not it has nothing to do with you. They're trying to enjoy themselves, just as you're trying to enjoy yourselves, and while in public you may be forced into situations where someone is doing something you don't like, bear in mind there are times when you do something they won't like.

I hate to say it, but we don't smoke just to be spiteful towards you.