Re the smoking thing- it's all very well people thinking that, but it's usually because nobody has been 100% blunt with them as to WHY smoking causes low birthweight babies. Tell it like it is and people do at least register the facts. Years of being PC about everything have engendered this culture whereby people are terribly misinformed but if those who are meant to be giving them information aren't doing it in a way that is relevant then someone has to take some responsibility. Some things seem dead obvious when you know them, but if you don't, you don't know what you don't know. Although as you say, some people really are just daft but as long as we aren't allowed to put contraceptives in the water supply I think we are stuck with those few...