Eye in the Sky

I just watched the film Eye in the Sky - incidentally Alan Rickman's last film - which raised the moral dilemma of drone targeting and collateral damage of drone attacks.  The basic question posed by the film is whether it is justifiable to take out three high-level targets and a couple of suicide bombers via drone attack, with the likelihood of a young innocent girl being killed in collateral damage.  What does it say about me that if I was making the film it would be a hell of a lot shorter - hell yeah, take them out.  This reminds me of the ethics behind the "trolley problem" - whose choice seems obvious to me...