So why didn't he just do the neighborly thing and give them back? Sounds like he brought it on himself and then escalated things.
I don't think that is the point. Sure, this time Drones were used to catch someone who actually did something wrong, but what do we do when the government defines "wrong" as disagreeing with them?
There is supposed to be a law preventing the use of Military equipment and personnel from being used against civilians. It is called the Posse Comitatus act.