Well, then I'll kill them too
With each passing episode, the MIL has done a lotta flip-flopping with his intentions for the candidates. Is he bad, or is he just bad-bad? Poll is in the sidebar, elaborate in the comments.
Check out Lostpedia to get you started; most notable to us is the suggestion that "the Man in Black has a name that is significant to the show, but the name is presently unknown even to Titus Welliver." Dig.