I've read all the books and never once wondered about Dumbledore, it just doesn't seem to matter at this point, as we all have been saying.
Several people in my church have read the books (some are veen pretty die hard fans!) and as a youth pastor's wife, I've wondered more than once if I should move the books from our very public, in plain view bookshelf in our living room, "just in case." Each time I wonder about it I don't do it and my husband agrees, there is no reason to put them away. The stories are well told and I imagine, when I have kids and they are a little older, they will probably read them. It's a personal choice and while I read the Bible and try as I might to follow after its teachings, in the grand scheme of things I think Harry Potter matters very little. Besides, people questioning why I read them could open up doors for deeper discussions, which is good.