Re: This problem is what shotguns are for...
It's certainly not a new idea, I remember an episode of Tarrant on TV 20 years ago where he showed some footage of a bunch of Americans having fun with machine guns out in the desert, shooting countless rounds into the middle of nowhere. The last part of the video was of them at night, one person launched an RC plane with LEDs down the wings and explosives on board for everyone to aim at, it did look pretty spectacular with all the traser rounds, and they're still doing it - youtube.com/watch?v=RR5BtXP0s0o
But with moden day RC tech, last year this was uploaded to YouTube, Guns vs racing drones at a shooting range - youtube.com/watch?v=xq0oCM37oZA
The law enforcement guys don't know the size & speed of the racing quads they'd be shooting at so start bragging how easy it'll be to shoot them down, until they actually see their size & speed.
Multirotor technology is still progressing very fast in comparison to the speed at which laws are passed, and the technology is getting smaller and more powerful; currently I'm having lots of fun flying a micro brushless quadcopter with wireless camera that measures 13*13*6cm, weighs 91 grams with the battery and I've clocked it at 44mph, such quads barely existed a year ago and now there's many to pick from.