Let's pretend for a second that there was a Bruce Wayne/Batman type of figure in the world, not necessarily an eccentric billionaire per se, but merely someone who had the means, motive, resources, and almost genius-like detective skills to go out there and hunt down criminals and obtain proof of their illegal/despicable actions. Only unlike Batman, this person's way of dealing with such people was more akin to The Punisher's, Dexter's, and Paul Kersey's (Charles Bronson's awesome character from the old Death Wish films) way of dealing with them, which was to straight up eradicate them from the earth via killing them. Furthermore, let's say this person only targeted the worst kind of deviants in society and didn't just go around offing people over every little thing (which is one of the main dangers of vigilantism.) Murders, rapists, terrorists, kidnappers (I consider them among the worst because their ransom demands usually involve them threatening to murder the person they've kidnapped if their demands are not met), people who rape/beat/molest children, violent drug lords and cartel leaders, etc. Basically just about anyone who seriously threatens the lives, safety, and well-being of general society. I know this may sound wholly implausible and a bit on the fantasy side, but try to envision for the purpose of the topic that there was someone or a group of people out there who fit this idea as realistically as possible. If such a person or if such people did exist and proved to be very effective, would you support their doings (even if it was secretly) or not?