Someone's been vandalizing compact Smart cars in San Francisco, flipping the tiny vehicles on their front and rear ends in the city's streets. NBC Bay Area found four of the targeted Smart cars between Sunday night and Monday morning. Two were found in the Bernal Heights neighborhood on Anderson Street, and another was found a bit south on Sweeny and Bowdoin streets, closer to the Portola district. They were either sitting on their headlights, rear bumpers high in the air, or vice versa. A fourth Smart car -- a small white one with a faded "Obama-Biden" bumper sticker -- was...