Now that I've discovered dripping and building I vape only in rooms with an exhaust fan in my house (I never smoked in the house at all) and when away from the home I treat it like smoking as far as etiquette goes.I think it's dependent upon location... if I'm in my house vaping up a storm and you can't see in front of you. well it's my house. if I'm at your house and ask if I can vape and you say sure just don't create a dog, cool I'll keep it down some. it's all about respect.