In a column in yesterday's Los Angeles Times, Ray Lemoine, co-author of Babylon by Bus, recounted his recent brush with the Department of Homeland Security. Lemoine was stopped at JFK airport while returning from Dubai. He'd been red-flagged because of a former job. Lemoine isn't a retired shoe-bomber or an ex-terrorist mastermind– a few years ago, he used sell bootleg t-shirts at sporting events. "Why did you infringe on the Boston Celtics' copyright in Boston in 2003?" the man from Homel