[Genghis_Khan]

In most libraries in the US, browsing the collection--even taking books from the shelves to a table for a while to read and make notes--does not require any sort of identification whatsoever. It's only when we temporarily deprive the library of a copy of a work, i.e., borrow it, that we have to identify ourselves.

[jakear]

In public libraries sure, but not in many academic libraries or other private ones. Which is of course where the more interesting (not mass-produced) content is held.

[tgv]

And nobody would call those open.