Tesla owners are disguising their cars as a sign of resistance. There are plenty of YouTube videos with tips on how to hide the evidence that you’re driving a Tesla. Others are putting bumper stickers explaining that: “I bought this before Elon went crazy.” People are selling or otherwise getting rid of their Teslas if they can afford to, and the stock is in a nosedive. All of these are a growing response to owner Elon Musk’s erratic behavior and lack of attention spent recently on running Tesla...