Perhaps a little historical perspective might serve you here, B3l. Go back as little as ten years or twenty years, and smoking was still the norm. Go back to the 1940s/1960s and everyone smoked - on film, on TV, in the pubs, streets, cinemas, restaurants, etc. Go back to the 1920s and you'll read that doctors were recommending people to smoke as being "good for you".

Many people who are trying to stop now - or who have stopped - probably started to smoke many, many years ago, when it wasn't always considered "disgusting and antisocial". A little charity - whether Christian or un-Christian - is always nice.