Firstly, I smoke. I don't smoke that much and obviously have no problem with non-smokers EXCEPT in the following cases.
a) EX-smokers who think they're fan-fuckin-tastic because they've "beaten" their habit and you haven't.
Actually, if you enjoyed smoking occasionally before and you now can't have 1 smoke without flying off the handle and finishing the other 19 in a pack, you have NOT overcome your problem. It still controls you, deal with it and stop thinking you're better than people who choose to smoke.
b) People who treat smokers like dirt, just because they smoke.
There have been many occasions where I've been walking through town whilst smoking and complete strangers have given me and my cigarette the stink eye. These are people that don't know anything else about me and will happily judge me based on this one detail. There are plenty of bad people in the world that never smoked.
The second point fits into what I'm going to say now pretty well too.
I'm 25 and when I was young the attraction to smoking was that we were told so many times that we couldn't\shouldn't do it. An adult telling any young person (of any era) isn't going to go down well. Today however, is a different kettle of fish.
It's my opinion that young people today (mainly in The States tbh) are being told that smokers, not smok[ing] is the big nasty thing to look out for. Running along-side the relatively recent smoking ban over here, this HAS caused 'success' in some respects as I've noticed a few of you 'Young-yanks' (sorry for the shite name, I made it up just now), actually do see smoking as some vile, despicable act.
Though I appreciate the lack of anti-conformist-conformism (not smoking in a failed attempt at rebellion), I fear that a lot of people are going to grow up instantly looking down their noses at someone smoking and to eventually see smokers out-cast even more.
The fact that this has already happened to me on a few occasions especially annoys me when the general population (of most countries) not only approves, but whores to the high heavens, the consumption of alcohol. Something that doesn't need 50 years of B.S. research to try and prove if using it effects other people. Drunken bar fights and physical abuse towards men/women/children in the home are the two main examples I'd like to make before leaving it at that and noticing I've gone on for some time now.
Smoke/don't smoke because YOU want to, not because others tell you to/not to.