Couple of random thoughts here, from a never-smoker:
First off, congratulations to anyone who is able to quit. I've seen both ends of the spectrum, my Dad just woke up one morning and quit, and never looked back, and I know people who have quit multiple times. One person in particular quit for 3 years, hit some rough patches at work and was back to his old levels within a month.
As far as taxing, if the tax is used for its stated purposes, which supposedly is to cover increased health-care costs and stop-smoking programs, then I don't think a reasonable tax is out of line. Sadly, I think like every other tax, the money goes everywhere but its intended purpose.
I have no problem with anyone who chooses to smoke as long as they're respectful; the butt's post above is a good example of the disprespect we see. A woman who I worked with and I would go out to lunch now and then and she smoked. Parking at the job was scarce coming back from lunch so we had an arrangement; if she wanted to smoke, she drove her car and lost her spot. If she wanted to keep her spot, I drove and she didn't smoke. Worked rather well.
I have a huge problem with governments making it illegal to smoke just about anywhere, like Illinois recently did. If a bar-owner wants to allow smoking in his bar, and makes it clear at the door that this is a smoking-allowed establishment, that's his business. If you don't want to experience the smoke, there are other bars out there. IMHO, there's a huge inconsistenty here; the government subsidizes tobacco's growth, taxes the heck out of its users, then doesn't let them use the stuff. If it's that bad, don't subsidize the crop.