During the first presidential debate on Oct. 3, KitchenAid managed to offend Twitter followers with a poorly executed joke about the president's grandmother: "Obamas gma even knew it was going 2 b bad! 'She died 3 days b4 he became president." Though the message was taken down quickly, it had already been seen and retweeted (again and again). The responsible employee reportedly sent the message from KitchenAid's corporate account by accident, instead of a personal account. The worker “won't be tweeting for us anymore," a spokesperson said. See how other corporate social media grunts messed up big time in just 140 characters.