On an average Saturday morning, there are five blue Toyota Priuses in the parking lot of our synagogue. I know because my children count them, starting with ours. They could do this with any popular item they own, of course (not that they have too many chances in our late-adapting household). But their hybrid love made me cringe last week, when the New York Times ran a story about the success of the Prius (purchase required), and I saw myself in it. Why are Prius sales surging when other hybrids are slumping, the Times asked? Because buyers "want everyone to...