A band of demonstrators, many wearing black masks, stormed a bustling San Francisco mall Saturday evening, upending garbage cans and foliage and damaging crystal merchandise at one kiosk. An estimated 50 to 75 people were involved in the disruption at Westfield San Francisco Centre, police said. "It felt like random, vague anarchy," said Sam Cantrell, who sells sunglasses at a kiosk near the escalators on the street level where the protesters gathered. "Everyone's yelling," he said. "Some people started running up the escalator the wrong way. People were grabbing their babies and running away in fear." The disruption began around...