Having the psychos be on the "right" side of things felt like the kind of ironic twist that the show loves so very much. :)

I figure as long as Dean is somewhere in the picture, Sam is never going to say "yes." It's only when Dean is gone that Sam loses sight of all his reasons for resisting.

Glad you liked it! And there may well be a sequel with the aftermath. Enough people have asked that I think it's inevitable.