MADISON — You might be forgiven for thinking John Washburn is paranoid. Plenty of people do, Washburn admits with some humor. The Germantown man, who tests computer software for a living, estimates that, when he gets to discussing the perils of electronic voting machines, about 70 percent of people think just that. Twenty percent think there might be something to his worries, Washburn said. And about 10 percent — those who do some digging — start to believe. “Quite frankly, I’m not really concerned by (being called paranoid), because it’s highly correlated with how much people have checked my claims,”...