I don't understand something though, if you're pro choice for cigarette smoking then you would technically have to be pro choice for other drugs like marijuana for instance as well - right?
Of course. I see no good reason to make marijuana, or in fact any illicit drugs, ilegal. Just tax them let people be.
Personally I'm divided, the truth is I'm also pro choice in that I wish we could just do anything as long as nobody else is harmed, however in this case many are harmed, passive smokers, the general public who pay for the health care of smokers, the families of the smokers...etc. not to mention those who grow up thinking smoking is cool and get into it.
I think the passive smoking problem is mostly fixed, with smoking banned indoors and family venues. In my experience, who don't wish to smoke generally don't encounter much passive smoking.
The argument for health care is moot, at least in Australia. Tobacco is overtaxed in Australia, and the return covers more than the burden of health care, so the public doesn't pay. In fact, the public profits.
The peer pressure argument is in my opinion silly. Underage smoking should be prohibited, but people grow up to be adults, and they are educated in the effects of smoking. They can take responsibilities for their own decisions.