Not sure how you're making the leap in logic to making the teacher the book banner.

I'm not making the teacher the book-banner. I am making the Board that pulled Maus from the curriculum NOT a book-banner.

My point is that the board's choice not to teach Maus is no different from a teacher's decision not not teach whatever book the teacher finds less suitable than the one the teacher chooses to teach. The battle here is between the board and the teacher over who gets to pick the books, not whether any book should be "banned." Thus, my quarrel is with anyone who says that Maus was "banned" by the board if they don't also say that every book not selected by a teacher is "banned" by that teacher.

I am rejecting the use of the word for either case, not applying it to both.