Reuters: Robots crowd Twitter brand profiles-study

http://www.reuters.com/article/2012/06/08/twitter-companies-idUSL5E8H86VM20120608

(Reuters) – Up to 46 percent of Twitter followers of companies with active profiles could be generated by robots, or bots, a study by Marco Camisani Calzolari, a corporate communication and digital languages professor in Milan, showed on Friday.