That's not what happens nowadays. Librarians are being brainwashed in the other direction, told that there should be absolutely no limits to access to information, not even for children. There is a lot of debate about limiting access to internet porn. Seems to me there should be a happy medium somewhere.
Agreed--there is quite a bit of sentiment in that direction.
I'm thinking more, though, in terms of getting hold of what's on the shelves, and getting access to the tools that allow one to figure out what's on the shelves.
While uninhibited searching of the World Wide Web is encouraged, some librarians (and I should emphasize that I'm talking about a very few, by no means all) seem to take pleasure in making access to the indexes of, say, federal documents and databases a real chore...