Anonymous Patron writes "One From LLRX:Could your library be sued for turning over an Internet user's sign-up information to law enforcement? What if you only did so pursuant to a search warrant? Here is a cautionary tale about an Internet service provider, AOL, that turned over subscriber information to local police in response to a search warrant. The subscriber is now suing AOL, and he just might win. It turns out that AOL apparently did not closely examine the search warrant, which was invalid..."