If there was some way to ALWAYS be right about a person's guilt, then I wouldn't mind so much vigilantism. But until we get effective psychics, or some really cool mind-reading machine, that isn't going to happen. And to be wrong, *EVEN ONCE*, is the danger that all vigilante "justice" risks. Then again, so do normal courts, just look at all the cases that DNA evidence is turning upside down. Scary.
So, vigilantism is wrong, but it hovers near the edge of grey. Enough that some people could sympathize, if not condone, the acts they take.
Of course, one should note the difference between vigilantism and good ol' fashion retaliatory vengence. Something that's FAR more grey than just vigilantism.
