the thing is, fads dont die, they go into hiding for 10 years, and then punch you in the face with enough force to kill a rampaging elephant. like how pokemon died off for a while, but basically has come back. Twilight will last until the publishing companies stop making money off of it. Vampires do not sparkle in sunlight, but they dont burn in it either (that is just a result of the discovery of the vampire bat in the americas and the stories arriving in europe). real vampires rank higher in mass murder then almost every killer excluding those who worked on the manhatten project (props to figuring out how to turn cities into nuclear ash in a matter of seconds).