When you are dealing with a limited inventory situation, I would agree with you completely. Amazon, however, has taken on the unenviable task of attempting to make available every single book and publisher available for sale in the nation.
Under the example here, they would say, 'OK, we'll carry every single book in the US, except that one - because it's filth.' So what happens if/when someone takes this to an extreme and says, OK, let's remove every book that someone finds offensive? With two or three titles, how soon would they go under?
All I'm saying is to go cut off the pipeline at the source, not at the end of the line. Go after the publisher. Hell, get Amazon to come up off the names of the reprobates who have purchased this drek! Go after them! There are several folks who have published supporting reviews of this trash - go after them! Use this as a tool to get this off the streets entirely!
So Namblazon's business goals excuse it from helping (greatly) in the promotion of child rape? Let's see, which is more important, Amazon's business goals, or not promoting child rape? Can't decide, can't decide...