sometimes they do pay attention to the advice to not smoke in the home - the woman in the flat next to me takes both her kids (14 months and 4 weeks old respectively) out onto the porch with her, even with the snow and ice we've got at the moment, several times a day while she has a cigarette. Sometimes people from other flats join her on the porch for a fag - it gets quite smoky, I hate walking through it. They have colds a lot.