Here's a cruel, funny use of the vampire metaphor: the "Twilight Theory of Regulation".
“You’re a consumer. You have money. I am a business vampire. I want as much money as possible. I mean, I’m out for blood. But I’m an ethical vampire. I am trying very hard not to bite you.” Edward confesses.
“You’re the vampire that doesn’t suck.” Bella nods.
“Yes. We just take what we need to live, and try not prey upon you. It would be easy too. See how sparkly I am when you look at me?”
“Yes. You do look very sparkly. Like an iPhone 5 or an iPad with a 7.9” screen. Shiny and new.”
“Exactly. It is our way of captivating you before we bite you.”
(thank you, Annette)