An anonymous reader writes: In 2011, a journalist named Natalie O'Brien published a series of stories on security problems in Vodafone's Siebel data system. "Customers' home addresses, driver's licenses and credit card details were all available online, O'Brien wrote, and criminal groups were paying for customers' private information." Now, Vodafone Australia has admitted that an employee went through her phone and text records to try and figure out who her sources were within the company. O'Brien wrote, "The invasion of privacy is devastating. It plays with your mind. What was in those texts? Who were they to? What did they see? What did they do with the information?" Despite the admission, Vodafone has denied that it engaged in improper behavior (PDF). The company says it found no evidence the employee was directed to do so by management. That said, leaked emails show management became aware of the privacy breach and its potential repercussions as early as 2012.