When Willie Mays took a job with a casino, glad-handing high rollers at golf tournaments and such, Bowie Kuhn banned him from baseball. But when Steve Garvey, Fred Lynn, and George Brett fell into the employ of the mysterious Mr. Roarke, proprietor of the fraudulent vacation scheme known as "Fantasy Island," which during its six-year run bilked hundreds of unsuspecting tourists of their life savings, Commissioner Kuhn said nothing.