The New York Daily News has a story (found on Kotaku) of two criminals who have besmirched the Mario Brothers' name more than anything before. Yes, even more than the movie and the CD-i games (both on YouTube).
According to the Daily News, late on Halloween night, a trio of cab passengers--two of which were dressed as Mario and Luigi--assaulted the taxi driver. The story states that one of the costumed video game characters tried to nab the cabbie's wallet, which led to the driver pulling into a gas station and demanding the passengers leave. The Mario and Luigi lookalikes responded by beating up the driver and taking his wallet while the other passenger, a man dressed in a 80's-style white suit--Tommy Vercetti, perhaps--kept a lookout. You can watch the altercation on the Daily News website.
The assailants are still at large, and were last seen at the Staten Island gas station. New Super Mario Bros. Wii comes out this Sunday.