Would you want to ask Madame Pince, the librarian at Hogwarts, a reference question?
Librarians in the media often appear as strict, stern, humorless figures who guard the information in libraries. We are so used to seeing librarians portrayed this way that, unless you are a librarian, you are unlikely to even blink when you see the next on-screen appearance of a scary librarian.
You should never encounter this kind of librarian at the Harper College Library
Also, even though you've probably figured this out already, Parker Posey doesn't work in our library either.
Some online links to further discussions of librarian stereotypes.