It's interesting how this mirrors Rob's position on property rights (which was that if people are free to develop their land as they see fit, they might make decisions that are aesthetically unappealing to him). If educators are allowed to make decisions about what reading material to make available, some might choose things that could be disturbing to some kids. A lot of this just comes down to how comfortable you are letting other people have the freedom to make decisions, but it gets presented as a discussion about the specifics of the books.