I grew up with my grandfather and father both smoking in the house in front of me all my young life, I am now 40, I remember hating smoking i mean really disliked smoke, worst part of this is at 25 i took up smoking, god knows why maybe because in the UK you could still smoke wherever, worst mistake i have ever made, it's one thing I am trying to avoid now with a 2 month old daughter.
never smoked in doors rarely smoke in my car and if on a long trip i stop at a service station, I am doing the same with the ecig, smoking out of sight and not near other people, hopefully now i have switched it will lead to fully quitting both, for me personally I don't want her picking up my bad habits, if she does it when she is old enough who am i to stop her, hopefully by doing what i am now she wont!
but i can well imagine if she tries my missus will point out how i used to be as a example of not what to do ;-)