Sure, librarians wouldn't know how to do they work, if they didn't get a list on 'not approved' books from the school boards. /s

It's something else if something can't be bought or placed on the shelf because its on some school provided list, and if you (librarian) decide you don't buy it because of (whatever reason).

The same with research, if something is not published, or funding on research is stopped because `we know climate change doesn't exists`, that no one can read it, because its not even created. But who cares, its useless debate...