I am a librarian.
I have an IQ over 150. I am not "dumb".
I am not a loony lefty.
There is no way I would take a phone call from an unidentified "Officer Jones" or "Officer Smith" and release a patron's personal information over the phone without first verifying the legitimacy of the request.
The actions of the library in this story seem to me to be entirely appropriate and reasonable.
I'm a librarian too, and I agree with you. They followed the right protocol, and in fact were prepared to cooperate within a very quick timeframe. This is a non-story, posted by someone who just has a "thing" against libraries.