As is your right to pass on the purchase for whatever reason you like. Eventually though, as the anti-smoking crowd gains MADD like power, "you", as a potential buyer of say, your "dream home" will be able to successfully sue the smoking owner for interference with "your" pursuit of happiness because "you" were cheated out of being able to enjoy that purchase by a smoker.
Now that is a real stretch. By that reasoning I should be able to sue the company I worked for because they didn't name me CEO, the NFL because I didn't get drafted and was cheated out of a great income, girls and fame. It is the market place at work. You smoke you pay but you have that right, the right to smoke and the right to pay for doing so.