I feel that for marijuana usage to become more acceptable, it needs to be bred to be much less pungent.
My brother-in-law stayed with us last weekend, and is a chronic pot smoker. Our garden absolutely reeked of the stuff. Fortunately the house to one side is empty, and our neighbour on the other side was away. But anyone else in the area must have thought we were going hard on it all weekend. Wouldn't be so bad, but my work has a zero tolerance policy on drug use (I work in the railway industry), so I didn't even get to join him.