Smoking, does not make for a 'bad' person.

Not sure, the reasoning for storming off, the way that he did. I guess, some people feel more passionate about smoking than others???

Have you spoken to your sister, about your right to privacy? Did she get joy, from witnessing your fathers reaction towards you? Her 'outing' you, wasn't a very nice thing to do. At least, not without talking with you, about health concerns or the like. And, that's something, also, your father could have brought up.

You are over 18, it's legal.