Jonny when it comes to the only variables being morals and ethics you are fucked either way you go. Everyone has different morals and ethical standards as you have seen in the post itself. What you have to think of is what it will take for people to go against their morals or ethical views to save others. No one would want to take out a plane full of people. (Sorry no matter what any of you say it would bring tears to your eyes if you had to make a choice of taking down a plane with your family or children on it.) A lot of people would tell you to take out the plane, but when if comes to that person actually making that decision things become more complicated mentally. Take out a hundred to save a thousand, yes this seems to be the better of your choices given. It makes more sense, but as stated there are so many more routes to take now that we have had the 9/11 attacks.