Would I be using this as a 5th grade classroom read? Probably not. That does not mean I would not recommend it to some fifth graders. It does, though, mean that I would not use it as a class novel. (Heck, using class novels is not a good idea in any event, but that is a topic for another day)
Is this censorship? Yeah, it is. The parent does not want her child excused; she wants the book removed. The story I read indicated that the superintendent was following policy and had asked for a committee to read the book and make recommendations. We will have to follow this and see how it concludes (and I would love to give you the link but I cannot locate it now. It is on my iPad and this hotel only has ethernet access!).
Finally, Deb Heiligman has a terrific blog post here: http://deborah18.livejournal.com/