I wish that an equal effort was made against illegal drug use (including pot) as it is done against tobacco smokers.
I think everyone would agree, but the issue in hand is that the prevalence (or former prevalence) of tobacco smoking made it nigh on impossible for the non-smoker - particularly those who do not like the smell of it - to be able to avoid the smoke.
There is a difference between the bible-bashing anti-smokers (usually ex-smokers themselves, like John Reid) and those who just want to get away from the smell of it.
I would simply think it rude to light up in such a confined space, regardless of my position on the matter.