Mark Zuckerberg says users that had their profile set to allow others to search for them by email address or phone number have had that information scraped by others. Because of this Facebook has seen malicious actors scraping up this information (Warning auto play video) and they have turned off this feature. Thanks for all the help Facebook.
In the call with media Wednesday, Zuckerberg clarified further. “It is reasonable to expect… someone has accessed your information in this way,” he said.
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Source: [H]ardOCP – Most Facebook Users Should Assume Their Public Info Has Been Scraped