Douches like this prick are why we can't have nice things.
I fly all sorts of RC aircraft, Quads, fixed wing plane's, Helis, even a flying lawn mower (model, not actually a lawnmower) and I've been doing it for 25 years and never has there been an issue of people getting upset about it until recently.
You know why? Cheap electronics introducing artificial stability at a price that allows any fucking moron without the slightest clue to buy one and manage to fly it for more than 10 seconds. Before artificial stability (i.e. before there was any hope of an RC quadcopter), pricks like this would have bought one, flown it for 10 seconds, crashed it in his front yard and that would be the end of it because he wouldn't be willing to spend that money again for another 10 seconds of flight time until he learned to fly. He'd never learn to fly because he's not bothering to try, he's just throwing it in the air without understanding how/why/when its going to come down and what effects thats going to have on others.
When I see assholes like this, I tell them to get their fucking quad out of the air immediately or I'm calling the cops, and I've called them twice, the last for some asshole flying over a high school football game. Guy was a software dev at a large tech company, should fucking know better and understand that a 5 pound object falling on your head from even 10 feet above is WAY beyond potentially lethal.
So take this worthless fuck out back, string him up by his testicles and keep him the fuck out of RC * so he doesn't fuck it up for the rest of us.
This shit is why the FAA cares, and I'm 100% with them on it. I don't want additional laws, but this is a real problem in a new arena that previously had barriers to entry that kept idiots out. The modern flight controllers (which I use and love) are like exploit kits for script kiddies. They give ability to do something without the tempering that comes with learning how to do it 'the hard way', or understanding the consequences of what you're doing.
I don't have a good solution to this problem because the problem is caused by adults who haven't grown up yet or are too selfish/ignorant to care and those are problems we've been dealing with since the beginning of time without solving, but it does have to be addressed, which problem means I'm going to get screwed in the process.
I can not stress this statement enough: The guy flying that drone was an ignorant fucking asshole. 50 lashes wouldn't be enough.