Because I can't remember one. These days, they don't seem like places for people to study or do research -- they're extensions of people's living rooms/nurseries/social clubs, etc. I can't imagine anyone getting any serious thinking done in there, unless they're equipped with shooting-range earmuffs and a full stock of anti-anxiety medications. The university libraries are still reasonably quiet, at least on the upper floors and in the study rooms. So I exempt them from my rant.