Christian knees are trembling, sensing imminent doom brought on by juvenile fantasy literature. Which is ironic, considering that they worship a big sloppy book that fits perfectly into the genre. Anyway, first there was the Harry Potter series, which turned all the teenagers into Wiccans (what?); then there was the Twilight series, that has led to an upsurge of teenagers drinking blood (I missed that one, too). What next?
Think carefully: What might happen if a "third wave" of popular entertainment inspires gullible teenagers to seek possession by demonic entities, thinking it's good for them? To those who believe in a real behind-the-scenes war between good and evil, the prospect is truly terrifying.
There are no people with magic powers or functioning magic wands, and there are no quidditch matches on ESPN; vampires aren't real, and all that can happen with rare instances of blood drinking is a little nausea and the potential transmission of blood-borne diseases.
Demons aren't real, and inviting one to possess you is just a waste of time that will make you look very silly. And the people believe it's a peril deserve a little terror, and should lock themselves up in their churches and not come out any more.