"to what extent are they actually being used for good? Stuxnet is the clearest example I know of these tools almost certainly decreasing a threat to US citizens

"to what extent are they actually being used for good? Stuxnet is the clearest example I know of these tools almost certainly decreasing a threat to US citizens" By this logic an equally good use would be to sabotage American military-industrial complex thus reducing threat to the citizens of many countries around the world.