Blogger wolfshowl asks, "Are library late fees inherently discriminatory and classist?" in the post "On Library Late Fees"
Any library, whether public, academic, school, or special, is about providing equal service to all members of its community. Although patrons may be split into groups that are treated somewhat differently, such as children’s versus adult’s cards in public libraries, those divisions are usually based on proven responsibility and need. Some argue that late fees are charged evenly across all groups, so they are fair, but I’m not so sure.
Full post here: On Library Late Fees