by Vera H-C Chan Students these days may have a technological edge, but don't mess with the lunch lady. She has control of the grub. New Jersey high school students digested this hard lesson after plotting a cell phone-fueled food fight. Instead of getting extra credit for imaginative use of technology, irked cafeteria workers served up vengeance cold . And in case you don't know what vengeance tastes like, it's cheese sandwiches, two days straight.