I've broken them all, even some bad ones, and my children are just fine.
No, honestly some of them are ridiculous. I'm expected to wrap my kid in a million layers of clothes along with myself to stay warm because blankets aren't safe? Sorry, ain't happening. I think its dangerous for babies to wear much more than a diaper to bed during hot weather-and even in cooler weather it gets horribly uncomfortably hot when you've got two adults and a baby in the same bed. No one is going to be too cold, that's for sure.
I also use pillows. Seriously-I'm expected to sleep with no pillow? I wouldn't even be able to fall asleep and if I was able to, they'd have to haul me out on a stretcher and take me straight to the chiro. Besides, the baby is never near the pillow anyway!
I don't drink, however I do smoke and do not always wash my hands and face before coming to bed (and I normally have a smoke before bed). I do not smoke in the house and my children are not exposed to second hand smoke, so I'm really not concerned about it. I've heard about babies being affected by inhaling my breath after I smoke, but I haven't read any hard facts about this being a serious threat.