The last character that I saw spawn such hate was Emilie DeRaven when she played Tess on Roswell- Tess was the 3rd wheel brought into add drama with the show's main couple if you never watched. It was horrible. And now, some of the same people love her now that she's on LOST, no joke.

I adore Jo- she's still got some development, but she's only appeared in two episodes so far and gotten a few minutes of screentime. I'm not opposed to shipping her with Dean, but I'm really all about the frienship, and the awesomeness of a female hunter. And I really don't think Kripke's gonna let us down- he hasn't yet.