I think the vampire craze is a longing for authentic LIFE! The problem in our culture is the longing for LIFE is confused by the desires of the flesh. Many young people flock to the Twilight series noting that the main couple chooses not to share the marital embrace, but the very lust of the flesh is still in play. We as Catholics long for LIFE and receive it by drinking the very BLOOD of Jesus at Mass- -The whole vampire thing seems to be a mockery of Holy Communion.
Fr. Barron analyzes this well - (Click title to see the video)