I'll be honest, I just watched the whole Harry Potter series the other day. Not once when watching the movies have I thought that it could summon evil spirits, and contain actual curses and spells. St. Edward Catholic School in Nashville, Tennessee just banned the Harry Potter series from the school library.
Reverend Dan Reehil, the pastor who runs the school told The Tennessean quote, "The curses and spells used in the books are actual curses and spells, which when read by a human being risk conjuring evil spirits into the presence of the person reading the text." Reehil also says he consulted with several exorcists who confirmed his theory and told him to ban the books.
Sorry Harry, it looks like Hogwarts is the only place you can practice magic.