It's a personal issue. Lot's of folks don't smoke for their own personal reason(s). It's very hard to be against something as an individual and have an objective opinion about it.
I could go on about why it is never a good idea to smoke while hunting - but then, I have a very strong opinion against smoking at all. It can't be separated.
At least, for now, you are free to do anything that God and the law will allow. I'm thankful for your right to choose. But all we can do is reinforce, or aggravate, your already selected predisposition.