The Books sub-Reddit on the Reddit web site gets asked a question about why libraries are no longer quiet. Interesting to read some of the responses from the book-lover types who hang out in this area even though there aren't too many unexpected revelations in the answers provided (except that some libraries – in the UK possibly? – rent DVD's rather than loaning them for free) and many reply in terms of their experiences with academic rather than public libraries.
[Edit: oh, one other revelation from near the end of the thread – Reddit has a sub-Reddit just for libraries. And…subscribe!]