What you're seeing here is another arms race starting, caused by inconsiderate idiots.
Personally, I think the XKCD idea is more viable: place them outside the law other than liability for damage they cause. Anyone who does not have enough braincells to realise the danger they cause by hovering near airports in aviation space and by fires where aircraft are trying to bring water should not only lose the thing but have it compacted and rectally inserted by way of forceful and memorable education.
Ditto for people trying to take a peek in someone else's garden, but I'm wondering if it would not be possible to develop an auto-aiming 10.000 candela torch for that - that's bright enough to reach up to flight height but would still sufficiently disperse not to cause harm to any aircraft in the vicinity (the main issue with lasers). Plus it lights them up nicely for some buckshot, but that's not always possible (I'm not a government, so I don't get to call it "collateral damage" and get away with it).