Are the available books for teenage girls doing more harm than good?

Are the available books for teenage girls doing more harm than good? From falling in love with Prince Charming to falling in love with Vampires, such is the transition of books for little girls through to books for teenage girls, or so it seems. Love, romance and perfect happily ever afters (albeit after a degree of struggle) makes for a rollicking good read but are these books doing our teenage girls more harm than...