I don't understand all this talk of death and destruction. I fly a decent sized plane for a living and I just don't see how this is a problem. Birds are a much more significant threat than a drone and nobody is campaigning for the abolition of birds. Multirotors, model helicopters, model planes etc don't fly in swarms or flocks so the maximum risk is only the same as a bird strike. Bird strike is a risk we factor and attempt to mitigate so why is there such a focus on multirotors? Stop calling them drones by the way - they are not generally autonomous and if they are they are covered by CAP722 or similar in other countries. If you're really bothered about it why not fingerprint models with smart water or something similar so that owners can be traced if something goes wrong. Our industry has got bigger problems than RC models - psychos in the cockpit, nutters in the back, pay to fly issues, declining skills..
I'm more afraid of thunderstorms - ban them!