Well this is kinda like the "What does it take to get you to cross a line you never think you'd cross?" thread. My question is, how much money would I have to pa you to kill a stranger. Obviously the type of person he was will matter to some people, it would be far easier for many people to kill a 50 year old rapist than a 5 year old kid. However, I cant really make up a whole life story for him. All I will say is that the fictional stranger is 25 years old and has no known relations or people depending on him, so nobody else will suffer for his death.
I guess you could argue that with the money you got for killing him you could save many more people who where poorer, therefore making it ok.
You would never be caught, so a punishment that would be given to you is not a thing to consider.
So, how much would I have to pay you to kill him?
Wierd poll I know, but it just came to me when I was thinking about New Orleans, that humans do have a price in money that they are worth, how much just depends who has to pay it. The poor black people in New Orleans clearly had a fairly low value to the goverment or more would have been done to prevent there death.