Students from around the nation have been taking to Twitter and other social media sites to post snapshot photos of their meager lunches — in some cases, a sad-looking sandwich with a carton of milk — and say to the first lady: Thanks a lot, Michelle Obama, for the rations. One wrote, next to a picture of a hot dog roll that seemed spread with tomato sauce and cheese, on a tray with three small cherry tomatoes and a carton of lower-fat milk: “You call this a [expletive] lunch? @BarackObama @MichelleObama,” The Blaze reported. And others were just as blunt...