Yes. Unless you vaporize or ingest cannabis. Even then, if you smoke more than both of these, you're a smoker.

No. People's life desicions are their own to make. I'm sure there's just about as many people that would tell you that "reefer" will make you a bum and will kill you. Any cigarette smoker who says they have not been fully informed of the harm and risks of cigarettes is a liar.