We used to smoke and quite heavily. Once I got pregant for the first time I stopped, as did my husband. I don't have a problem with smokers at all, I occasionally reminisce about it in fact, BUT I do however have a very large problem with people who don't consider the damage it could cause for children and pregant women. I can't begin to tell you how many times I am around people in enclosed areas or whatever and they light up and blow it in my direction and wave that thing around my kids, THIS ticks me off!! For those who are considerate I appreciate it beyond words!
You as a smoker have every right to smoke, but it is a proven health risk for several reasons for pregnant women and children too, they have a right to not inhale your smoke, so be considerate of that too.