There are more than 83 million active 'fake' users on Facebook
Tucked away in Facebook’s company filings published this week, was an interesting snippet of information. Although the social network had 955 million Monthly Active Users (MAUs) as of June 30, 2012, an increase of 29 percent from this time last year, some 8.7 percent of that figure – around 83 million users - were identified by Facebook as likely to have come from fake sources.
The number of people actively using the service is calculated using internal company metrics based on the activity of user accounts, and Facebook has determined that roughly 4.8 percent of its MAUs may have originated from duplicate accounts, with a further 2.4 percent coming from user-misclassified accounts (that is personal profiles created instead of pages for businesses or "non-human entities," like pets), and 1.5 percent from undesirable accounts (those created by spammers, for example).