Ramachandra Guha, WMD

In India, historian, biographer and cricket writer Ram Guha is considered one of our finest non-fiction writers. To a paranoid US security official, he's a weapon of mass destruction. Invited to speak at Berkeley and Oberlin after he'd spent a week lecturing at Vancouver airport, he was denied entry into the US.
"Why was I stopped? One reason might have been my jhola, a patch of mirrorwork on red which must have been as dangerously exotic to McCullough as it was appealing to my friend Mohammad. Another, certainly, was the letter of invitation from Oberlin, which specified a fee for my lectures which greatly angered McCullough. "How can they pay you so much," he said more than once, adding, "And for teaching history." (Also relevant perhaps was my place of residence, a city much demonised in the presidential campaign for "stealing American jobs"). Finally, there was a general paranoia in the week before the elections, fuelled in this particular instance by a daily target of suspects to be detained."
Ram Guha joins a long and distinguished list of people who've been harassed by US airport security officials: Rohinton Mistry (who was stopped and searched so many times at US airports during a book tour that he called the whole thing off), Senators Ted Kennedy and John Lewis (their names appeared, separately, on a government terrorist watchlist), Iranian film director Jafar Panahi (he was chained)... To the best of my knowledge, none of them had, have or will have any plans to blow up the United States of America, though if you offer them a .303 and the chance to pot a US airport security offical, all bets are off.