Sting stung a helpless 12-year-old fan Wednesday night during intermission at the Broadway hit “The Book of Mormon.” When the lad spotted Sting in the audience at the Eugene O’Neill, he approached the star and declared that “Message in a Bottle” was his favorite tune. But it wasn’t music to Sting’s ears. “I’m not Sting,” replied Sting, according to an onlooker. “I’m some British dude.” The Police frontman was spotted the next night watching Robin Williams in “Bengal Tiger at the Baghdad Zoo” at the nearby Richard Rodgers. No children were harmed.