An “unidentified electric vehicle” — actually a Tesla Model Y — accused of siphoning power from the local electric utility energized the gossip mill in the small eastern Montana town of Ekalaka last week, prompting front page newspaper coverage, a frantic apology and, in the end, much jawboning about the future of transportation in one of the most remote counties in the lower 48 states. Driver Chad Lauterbach said in an interview after the fact that he and his girlfriend, Allis Markham, had driven up from Los Angeles to volunteer at the county museum’s annual dinosaur festival. Markham, a nationally...