I've heard this discussion a lot, and I can never get over why people think these books promote witchcraft. I'm Christian- Catholic, actually- and I love love these books, and am actually kind of obessed with them- but it's a GOOD obsession- I want to keep reading to know what happens next, and I love discussing all the theories and possibilities in the books.
Okay sorry, I got a bit off topic, but anyways these books are about good FIGHTING evil. HP books aren't like, "Voldemort's so cool so let's be evil," not at all! Harry, with the help of his friends (note: shows value of friendship) try to stop Voldemort from coming to power. That's why I'm so confused why people accuse these books of being evil- sure, they have magic, but it's FANTASY, and kids should know that in order to be able to read them. It doesn't teach morals maybe, but it shows how important it is to stand up for what you believe in (ok, cliche, I know, but true) and other great values. All in all, I think it's a great book and it's stupid some people want to ban it from schools.