Exceptions to this are rare. This change seems due to the publicity about pornography on the Internet, public pressure, and a good understanding of how simple it is for children to be exposed to adult Internet material when filtering is not in place. It appears that school officials have also found that AUPs, by themselves, do not work. It would not surprise us to find similar results anywhere you had normal, curious children. While the K-12 environment is readily adopting Internet filtering without the added pressure of a legislative mandate, the same is not true of libraries.
Some libraries do have various forms of Internet filtering on their computers.
Our observation is that most do not. Filtering in the library environment is more complicated and much more tied to legitimate free-speech issues than in schools. Some librarians are adamantly opposed to filtering on First Amendment grounds. Those who are not are worried about litigation or the threat of litigation and have resisted the urge to filter. The demand for filtering in libraries is relatively low and will probably remain so until the courts resolve the extent to which librarians can filter.