I lump the critics in with the Harry Potter alarmists. I haven't read the books, don't care to. But I do know that watching Bewitched as a child didn't do me or the nation any harm.
An entirely different thing, this Da Vinci Code, since Harry Potter novels do not go out of their way to explicitly reject the central tenets of the Christian faith. With the author making TV appearances, documentaries in support of the ideas, and the book itself, there is a broad span of people who have read the book and believe. Less than two weeks ago, after I told my aunt that I was born again, her response was "Don't tell me that!" or words to that effect. She then went on the spout the same line of argument about the Council of Nicea making things up, etc.
In short, this only serves to give ammunition to the Enemy.
LTS