Think force multiplier Ozark.

Little Haji and his friends are playing in the mud over there like all young kids do and the Rover launches a Hellfire missle that scatters his older brother and friends all over the landscape. Since the kid still has mush for brains and is VERY impressionable it imprints on his gourd.

Next time the bad guys come round to recruit little Haji he remembers spatuling his old brother off the roof and takes a pass.

So, when you're adding up the costs of blowing up bad guys you have to factor in the psychological bennies too. As one buddy in the sandbox says, the big bangs have a real calming effect with the natives over there.