If such restrictions were to be enforced, talk about unsuitable books wouldn't be high on my list of things to restrict - I'd suggest completely eliminating all homophobic and sexist language in the playground first, for example... OTOH, I would have absolutely no problem with the teacher pointing out to someone that the book he's very enthusiastic about is something that some children his age would find very upsetting, and asking him to be sensitive in how he talks about it and to whom.
Homophobic language on the playground? I don't think I even knew homosexuality *existed* until I was in late high school. Maybe college.
Horror movies like Poltergeist, Nightmare on Elm street? That was normal playground discussion. Granted, this was the 1980s.
