As of June 30, there were 83 million fake accounts on the site, or 8.7% of the total of 955 million. Of those bogus accounts, 1.5% were classified as “undesirable” and set up “for purposes that violate our terms of service” Security experts agree that Facebook will need better user-verification tools to help combat the problems. The disclosure comes as Facebook is under increasing scrutiny by advertisers, some of who have complained that Facebook’s ad model is ineffective.”]