The modern library is a place of learning. No longer is it believed that libraries should only be repositories of books. Most libraries have a reasonably sized
audio-visual department, several internet connected computers and a number of
horn-rimmed spectacle-wearing
librarians, as well as the traditional books.
It is good manners to keep your voice down to a low level, as people may well be studying for exams or researching some vital PhD paper.
Libraries often become geek magnets, due to the vast collection of knowledge available in paper, magnetic and meat form. However, the computers also attract other users who want to see if they can bypass the filters and get to the porn sites.