I wonder if projects like this will trigger the development of drone countermeasures, leading to an interesting arms race and regular battles in the skies above us.
Almost across the state Jersey municipalities have no discharge laws preventing from shooting on your property so this is more about discharging a firearm than drones. Now if you had some type of EMP device that wasn't covered under firearm laws...
shotgun is a bit overkill for sub/urban environments, although i agree it would be especially effective. i've never shot clay before and i was able to hit multiple times on my first clay outing.
however i imagine it would be no more than a weekend job to design a net-firing sabot or perhaps some kind of plastic scatter shot that could launch out of a t-shirt cannon.
My understanding (from an undergraduate US law class) is that you actually own the column defined by your property lines up into the heavens (and down into the Earth). You implicitly grant an easement (a formalized privilege allowing someone else do something with your property) to aircraft and other things like that. I imagine that this easement doesn't extend to drones doing something they're not supposed to.
It probably wouldn't, when the rotor has incredible suction and the tangle wire is very thin. I would certainly expect an attacker using monofilament and a defender using several-mm mesh to go the way of the attacker. Too much protection and you lose the airflow.
I must immediately tape speaker mesh to my AR drone! FOR SCIENCE!
A lot of things have regulations yet people still need to develop defenses against them. Kevlar is still needed in countries where guns are heavily regulated.
If you're a small bird, try not to be seen and spend most of your time in areas cluttered by trees and other object to exploit your size and maneuverability. If you're a big bird, spot your targets from distance and strike at high speed.