It's not that I have a problem with them keeping sexually explicit books off the list. The problem is that the criteria for filtering is not disclosed. Theref

It's not that I have a problem with them keeping sexually explicit books off the list. The problem is that the criteria for filtering is not disclosed. Therefore the list cannot be "trusted" in the sense that it can be believed to be displaying what it says it's displaying. In fact, we know at least in one sense it's not displaying what it claims to display.