In advance of the GOP convention at the end of this month, New York City is being plastered with stickers that read, "I'm Gonna Kill the President" - supposedly an advertisement for a new off-Broadway play staged by the anti-war protest group United for Peace and Justice. "It's the name of a new comedy to run in the East Village during the Republican Convention," WABC Radio's George Weber reported Tuesday morning. Weber called the box office to find out what could be funny about the murder of an American president, and got this recorded response: "Howdy," chirped a spokesman. "You've...