SCRANTON, Pa. - Shannen Rossmiller isn't a terrorist. She just plays one on the Internet. In the wee hours of the morning, while her family sleeps, the former Montana judge goes online and assumes the identity of a Muslim extremist — the better to strike up conversations with actual terrorists and, she hopes, ferret out their plans to harm the United States and its allies. Then the 38-year-old former Miss Congeniality and married mother of three feeds the intelligence she gathers to the FBI. Her moonlighting as a volunteer terrorist hunter has brought down two suspects in the United States...