Like others here, there were a few times when they thought they were justified, usually for things like clothing, language and country of origin. Who knows, they may have had a point.
For no good reason? A few times, usually while hunting. I usually fire a warning shot, there is no rule on how far you have to miss for it to be a "warning shot", and if it happens again I will fire for effect. No one has yet to take the second shot.
A friend of mine, ex marine sniper, was elk hunting. He watched a truck going up a logging road a couple hundred yards away. The truck stopped and a guy got out and started using his scope as binoculars.
My friend was pretty concealed but was wearing a lot of orange when he saw the guy point his gun at him and fire. The guy missed.
When my friend got back to town the whole place was abuzz about somebody shooting at hunters. Seems this guy had to have a tow truck come pull his truck back to town, because somebody had shot it in the engine.
My friend looked at the deputy who was telling this story, they were old friends, and asked if anyone had asked the driver why there were 6 holes inside a 2" circle in his fender. The deputy gave him a funny look, shook his head and left.
My reaction was, "6 holes, you had to reload", my friends answer was "yep".
DM