Facebook is being used increasingly in both legal and criminal investigations as individuals and law officials make use of the ability to reach a mass audience, with a lot of personal information in public space.

People who use Facebook more than once per day are 43% more likely to think that most people can be trusted. In fact, UK police reported that Facebook crimes rose 540% in three years. In UK, more than 100,000 crimes have been linked to Facebook in the past 5 years. In 2010 7,545 calls from the public to police concerned social media sites.