I didn't vote you down, but I wonder why you are so concerned about having more aggressive psychopaths killed/shot. You seem to think there is some advantage if they use a drone because that will be safer for them. Whatever is safer for them, however, is that much more dangerous for us. Think about it.
Edit: I see that I misunderstood your post. Probably others did too. But I think you can extract from what I wrote above a response to the guy on facebook. "What's the problem with having fewer police officers killed?" The problem with it is that it emboldens them to continue their antisocial behavior.
Addition: A cop friend of mine once told me that he thought they should supply all the gangs with MP4s and let them fight it out. Then they could cart off the last one to jail. Maybe the same applies to the cops.