There is nothing wrong with Women who smokes. The addiction to smoking is not bias to gender and therefore should not be treated differently.
Having said this, there are people who sees women who smokes and quickly judges them as being a women of the night / slut / cheap as its been portrayed in movies. However this has changed over the years and you can start seeing more women who smokes in high income country including countries such as USA, Australia and most of western Europe. In countries where the average income is low, you would not see as much women smokers.
There are a lot more women who picked up this smoking habits due to social factors and also the tobacco industry has found that making cigarettes like the "virginia slims" and marketing it to the females has been extremely profitable.
So coming back to the main question of what I think about women who smokes ? Its the same as what I think of men who smokes .. its just an addiction which has devastating effects on the human body.
I was a smoker and have been off "cigarettes" for 3 weeks now. Trying my absolute best to stay away from the urge to pickup a stick !
Cheers !