A Florida rapper was arrested for the lyrics of one of his songs in which he allegedly threatens a "massive shooting," which is considered a crime in this state, local media reported Friday.Christopher Maurice McCallum, 26, was arrested Tuesday in Alachua County, central Florida, for posting letters on his Facebook account saying "catch you at a Gator game and shoot the whole campus up. "The lyrics of the song have their origin, according to the Fox News channel, in a dispute between McCallum, aka Jun Jun, and another rapper.McCallum's...