Sheldon Adelson, the billionaire atop the Las Vegas Sands casino empire, must surely hold the unofficial U.S. record for appearances as a libel and defamation plaintiff. I've written before about Adelson's quick trigger for libel claims, but he outdid himself this February when he sued Kate O'Keefe, a reporter for The Wall Street Journal in Hong Kong, over a December 2012 piece in which she and a co-author referred to him as "a scrappy, foul-mouthed billionaire from working-class Dorchester, Mass."