Yeah, 1991 was hardly the dark ages when it came to knowlege about smoking. That's the time frame in which I grew up, and I was certainly bombarded with information on the dangers of smoking on a near-daily basis.
It's interesting you should say that, Anchorhead, as my mom smoked when she was pregnant with me, too. She always justified it, though, because she never inhaled.
When I was little, my mom would smoke outdoors until nightfall. Then I would banish myself to the back of the house while she smoked in the living room. When I was 11, I got her to quit smoking, but it didn't last very long, so, in order to hide it from me, she would go outside to the patio adjacent to her bedroom. I eventually found out (mostly because my friends would walk by outside and see her), but after that, she always smoked outside. Even after I moved out, she only smokes outside.