Neighbors can be annoying, for sure. One of my neighbors smokes pot on occasion on his back porch and if there's no wind the smell hangs in the air for a long time. Not the most pleasant habit.
Its legal here, we generally have a ton of wind, but sometimes you can smell it when walking downtown. No less unpleasant that cigarettes IMO. But at least they aint vaping, we have a TON of people out here that vape.