Exactly once.
Remember - Having pepper spray displayed in a prominent place on ones person is a deterrent to violence and not a provocation. If someone takes it as a provocation then it is that person that is going to be gasping for breath and crying like a baby. I hold my breath and move quickly from the spot.
Flying over a local parks baseball field outfield . All the kids on the team doing "infield " practice could not keep thier eyes off the drone and that infuriated the manager. Manager decides to storm over - I mock him by storming towards him across the field using the same body language and stride. He did not like it at all. I told him there are no rules or regulations prohibiting flight in this park (I had checked beforehand) The outfield was essentially stretching the entire park and I was in no way shape or form flying over people or personal property. Manager kept yelling and yelled " take a swing" I replied " Ive got a drone and controller in my hands and have way to much to loose" . " I could give you some spice to go with your spicy attitude though" I looked at my canister intentionally as did he.
In this case I broke my own rule as I had not created it yet. Never land and hold your drone. Instead get a nice vantage point of the situation and parties involved and film, film , film. Even if the cops DO show up film , film ,film until instructed to no longer do so.
The other event did not escalate. Flying at a local Tahoe Point of interest. I was down a trail on the weekend. Sightseers were up above at the look out point. Some Douche kept yelling to the crowd. "Hey theres my drone" I yelled " Then why dont you come down here and get it" . Then a few minutes later "Hey theres my drone" Same response from me. He left after that.
There is about a 10:1 ratio of cool people to douches when flying drones.
Loved your line, "In this case I broke my own rule as I had not created it yet."