I think book banning is indefensible. Removing a book from a school curriculum is not at all banning, though. And not carrying a book in a school library is s

I think book banning is indefensible. Removing a book from a school curriculum is not at all banning, though. And not carrying a book in a school library is somewhere in-between those extremes. The context is probably the determiner, there... why is it being removed? I'd be inclined to view pulling books negatively, though.