A false tweet from a hacked account of The Associated Press demonstrates the limits of oversight, says Bart Chilton, a member of the Commodity Futures Trading Commission. Chilton says the incident should prompt regulators to consider traders' social media use. "Part of our job as regulators, I think, is to think out of the box. ... So that's a question I have, is whether or not we should require additional safeguards for social media sites for people who trade in the markets," Chilton said.