I had a similar experience. I try very hard not to smoke where it can bother others. So, on cruises, I will usually haul my butt out to the aft of the ship where the wind carries it totally away from anyone. One night, I was out there and a couple came out and walked to the opposite end of the deck, then started complaining loudly to each other how horrible I was to be polluting "their" air. I was not aware that they owned it.