In the United Kingdom religious figures, in particular the archbishop of canterbury, have called for a ban of the Harry Potter books for their glorification or witchcraft and wizardary and the abject fear that the texts will encourage readers to take an interest into the dark arts and satanism.
A few years back the first Harry Potter film was shown on a popular terrestrial channel at christmas time prompting the archbishop of canterbury, during his new years speech, to broadcast his digust of showing heathen activities on Christ's birthday.
The Catholic Church, and other religions, are extremely powerful and object very strongly to witchcraft and other such activities that oppose their religious messages. In my opinion i'm suprised that Harry Potter hasn't been successfully banned.