Martinjmpr, I'll disagree with some caveats. We should be exercising judgment any time we pull out a firearm and observing all the safety rules we were trained by -- including knowing your target and what's beyond. The guy in question said he thought the drone was trying to take pictures of his teenage daughter who was sunbathing. With that in mind, I see nothing wrong with downing it with a shotgun if the drone is doing multiple low level passes as was claimed and he knows there's nothing beyond the drone in his zone of fire. Whole different situation if there was an apartment building or a plane behind the drone when he fired.

I have a couple of multicopters, one big, one tiny, and another on order so I don't want people shooting at them but I'm also not going to be doing low level passes over the neighbor's girls in their backyard. If someone is doing passes over my backyard while I'm in the hot tub, I'm not firing at it in an urban residential neighborhood (and having to look at pictures of me in the hot tub is probably punishment enough anyway) but if I was out in the country and had a safe shot, I'd certainly consider it an option if I thought he was snooping on my wife or daughter.