Here's a bizarre one on so many levels. The FBI has a top secret 70-page "interrogation manual." For years, the ACLU has been trying to get its hands on a copy, finally receiving a heavily redacted one. However, it turns out that if the good folks at the ACLU had just decided to wander over to the Library of Congress, they could have seen a totally unredacted copy of the entire manual, as could anyone else with a library card. Why? Because in this bizarre age we live in, in which people seem to think it's important to copyright absolutely everything the senior FBI official who authored the manual decided that he should try to register a copyright on it, and submitted it to the Library of Congress as a part of the registration process, whereby it becomes available to anyone who stops by and asks for it.