[quote=thewizardguy]
There are other people who have tried that. Kill all the bad guys. Allow me to name a very prominent man who tried to wipe out all evil in the world. His name was Hitler.
[/quote]

Yes, but Dexter does it in a small way taking out people who are evil and/or people who deserve punishment, but cannot legally be touched, instead of trying to wipe out a bunch of innocents who he'd deem 'evil'.