It's a serious question, right?
John Locke was a good guy and he had a long track record of being reliable. Then one day he was taken over by a Smoke Monster and became the most evil man alive.
Trevor Hoffman was one of the greatest closers of all time and he had a long track record of reliability. Then one day he started to blow every save opportunity he had and gave up tons of homeruns, thus becoming pure evil.
Just a thought.
(Yeah, yeah I know he pitched a good eighth inning yesterday. It's a trap. I'm not falling for it.)
(Side note: Thank God that stupid show is over and I never have to watch it again. It's crazy how something that was once so great, that used to make me care about stuff could fail so miserably to make me care about anything in its final seasons and episode.)