Don't forget:
Evil, because although they are actually doing something good, they are the villains for doing it through evil acts.
That would be a variant of the "the ends do not justify the means" quote I take it?
Yes, although I always find it interesting the irony present when the heroes realize they just finished with the only hope many other people had, like in Tales of Phantasia. Where there is a big, "Oh no, what have we done?" situation.