“As a former dispatcher, I hav always felt that approach plates should be controlled..”
These Jeppesen runway approach maps seem to be widely disseminated to all pilots these days in digital files that terrorists could likely have no problem obtaining.
That being the case it would seem to be most practical to defend runway and approach “kill zones” and alert officials and the public to observe and report drone activities near airports as well as develop drone counter-measures for military bases and VIPs like the POTUS.
Brighter minds than mine, etc....
Posit two scenarios. The bad guys are using aviation frequencies and their locations can be determined.
They use hobby frequencies and whatever may be affected would be momentary and inconsequential to legitimate users. Radio control models will just be unable to operate within x miles of airports, and surveillance cameras can be set up near all the likely places the bad guy would pick to do the deed.