I'm very interested in the consequences of vigilante applications of this kind of technologies. Imagine a scenario where people start taking out corrupt police officers who have until now been able to terrorize small communities with impunity.
It may motivate actual reform in policing because law enforcement will realize that police officers who kill innocent people with no regard for the law are safer in prison than out on the streets with a paid vacation / desk job punishment.
You need drones to do it in a way that significantly reduces the risk of getting caught.
As it is vigilante action against law enforcement in the west is a sure death sentence and probably life long reprisal against your family once you're dead which is what keeps people in line.
If the development of drone technology significantly reduces the risk of that then you're likely to see many more people respond to violent abuses of authority by law enforcement with vigilante action.
It may motivate actual reform in policing because law enforcement will realize that police officers who kill innocent people with no regard for the law are safer in prison than out on the streets with a paid vacation / desk job punishment.