cofee - years ago yes, most adults smoked. but most kids didn't spend as much time with them, and certainly not cooped up in the house or car. Kids would be playing out all day every day. so probably didn't get exposed to as much second hand smoke. then of course there were probably fewer chemicals and other pollutants too. they make a hell of a difference.
but re the smoking is bad for your kids thing - Look. there's no point getting pissed off, folks. You might as well get pissed off when someone tells you water is wet.
smoking is not good for you
smoking is not good for your children - unless you are washing your hair and clothes after each fag or staying away from the kids for 2 hours after each fag - you are exposing them to the fags! those chemicals linger. Just because you don't want to hear it doesn't make it not true. Just because you feel attacked or criticised as parents doesn't make it not true.
just because there are other things that are also bad for people, doesn't make smoking or being exposed to smoke not bad for people.
reality is, it's not good for you and it's not good for your kids. fact. no need to get defensive, you know this to be true.
I know this to be true as an on again off again on again smoker. (currently off again) I did the most horrendous thing - I smoked during my pregnancy with my second child. I am deeply ashamed of it and firmly convinced it's why he has asthma. I hate myself for it. But my point is - I knew the risks (as do you all) and I put my desire for a fag above all that. I hate myself for that but I would not attack someone for pointing out that I was selfish and took a big risk and am probably responsible for my son's health problem. Because I know this to be true. It might hurt to hear it though.
People don't like to be forced to remember what they are doing when they smoke.