DANVILLE - Midnight settled on Dinah Thompson's Danville home, and the thief padded toward her car. Shrouded in darkness, the thief pried open the Subaru's door. He found the hidden keys. He motored out of the driveway, slid down the street and disappeared into the night -- a stealthy getaway, were it not for one common commuter device: FasTrak. From the early morning hours of Sept. 22, when her car was stolen, Thompson tracked the thief by logging on to her online FasTrak account. She knew, for example, that at exactly 2:22 p.m. that day, the car thief bolted across...