"I'm so scared now. All my activities are on Facebook," Mohammad ZR Zia, a 25-year-old college student in Kuala Lumpur, Malaysia, who has been using the social media platform since 2009, told Reuters. His account was logged out earlier on Friday. The level of concern expressed on Facebook was enough that the company's automated systems blocked sharing of a Guardian newspaper article about the breach. "Our security systems have detected that a lot of people are posting the same content, which could mean that it's spam," a message told users. "Please try a different post." The company did not respond to a request to comment on the issue. Facebook has suffered narrower breaches before. In 2013, Facebook disclosed a software flaw that exposed 6 million users' phone numbers and email addresses to unauthorised viewers for a year, while a technical glitch in 2008 revealed confidential birth-dates on 80 million Facebook users' profiles. REUTERS