"Silence of the Drones"

"Silence of the Drones" - I love this phrase because it accurately describes the program now in use to further  US foreign and domestic policy, and it describes the lack of public outcry to a government program with no  apparent checks and balances.  I am not completely against the use of drones to eliminate foreign enemy combatants but I would like to know how the selection process works and how it could potentially be applied in the domestic arena.  I vividly remember the "enemies list" that was the subject of outrage during the Nixon years.  The potential for government abuse here is frightening.