21-year old Brian Tanner got busted by the cops up in Palmer, Alaska for using the local library's free Wi-Fi to play World of Warcraft after the library had closed. Patrolling cops seized the poor guy's laptop and claimed that although the library provides free Wi-Fi, there are rules governing its use. Rules which apparently Tanner wasn't following. Only one room in NY's Public Library offers free Wi-Fi (and you're not allowed to plug into an outlet) so I feel Tanner's pain, but if the library (which you'd think would want to provide free Wi-Fi for everyone) doesn't want people using their "service" after hours, then don't broadcast your signal.
Gamer Busted for Using Library Wi-Fi [TechEBlog]