I am proud to say I come from a long line of smokers and tobacco farmers. I like to smoke and I will never apologize for my right/choice to do so in public or in private.
I'm not sure the question is relevant. Sure, I smoke and make no apolgies for doing so. More important is the question of personal freedom.
Asserting and defending the right of the individual to smoke, or engage in any other purely personal behavor is more essential today as technology serves to magnify the group think of a pressure group and endow the government with a greater capacity to supervise each and every one of us.
We are all living in Jeremy Bentham's Panopticon now and must resist further encroachments or soon there will be no personal sphere left.