Fish, it's not brainwashing. Demonic spirits are very real in this world, a friend of mine actually went through something of the same ordeal. And no, we are not out against the world, ready to plunder, strike down, and hurt anyone in our way. All we're trying to do is to share a good message to the world, is that so bad?
And yes, the Harry Potter books are a pretty bad influence. But to me, it just shows that people are grasping for something, anything, that would give them "power." Let me ask you, have you noticed a rise in referrences to Wiccans and other occultic activity lately? (On the web, and in everyday life?) A kid could probably watch the Harry Potter movie, and think "Wow! Man, I wish I had that kind of power!" And then they pursue such a thing. It might start out "innocent" enough, with horoscopes, and such. However, I have actually talked with a man who was DEEPLY into the occult before becoming a Christian. He started out the same way that I just mentioned. He claimed to be able to do things that would make half this board shudder, I'm sure. And yet, he later said, "I thought I had power, but I was actually a puppet."
Those are my opinions on this issue. I'm sure some others would agree with me.