“Personally, I’d like to see a great many books restricted for primary school kids, only a few for middle school, and (outright pornography aside) no restrictions for high school.”
Your post sums it up best. Don’t take the books off the shelf, but if you’re the librarian, you have a responsibility to not let the book be checked out by anyone under a certain age.
That’s not what librarians say. It is banned books week isn’t it. You’ll note that homosexuality is heavily “banned”, but you’ll not find the most banned book in the world, the Bible, anywhere in the displays.