Facebook Security Keeps a Detailed 'Lookout' List of Threats, Including Users and Former Employees, and Can Track Their Location

An anonymous reader shares a report: In early 2018, a Facebook user made a public threat on the social network against one of the company's offices in Europe. Facebook picked up the threat, pulled the user's data and determined he was in the same country as the office he was targeting. The company informed the authorities about the threat and directed its security officers to be on the lookout for the user. 'He made a veiled threat that 'Tomorrow everyone is going to pay' or something to that effect,' a former Facebook security employee told CNBC. The incident is representative of the steps Facebook takes to keep its offices, executives and employees protected, according to nine former Facebook employees who spoke with CNBC.

The company mines its social network for threatening comments, and in some cases uses its products to track the location of people it believes present a credible threat. Several of the former employees questioned the ethics of Facebook's security strategies, with one of them calling the tactics 'very Big Brother-esque.' Other former employees argue these security measures are justified by Facebook's reach and the intense emotions it can inspire. The company has 2.7 billion users across its services. That means that if just 0.01 percent of users make a threat, Facebook is still dealing with 270,000 potential security risks.

One of the tools Facebook uses to monitor threats is a 'be on lookout' or 'BOLO' list, which is updated approximately once a week. The list was created in 2008, an early employee in Facebook's physical security group told CNBC. It now contains hundreds of people, according to four former Facebook security employees who have left the company since 2016. Facebook notifies its security professionals anytime a new person is added to the BOLO list, sending out a report that includes information about the person, such as their name, photo, their general location and a short description of why they were added. In recent years, the security team even had a large monitor that displayed the faces of people on the list, according to a photo CNBC has seen and two people familiar, although Facebook says it no longer operates this monitor.

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