A mobile developer has discovered what he claims is a security vulnerability in the Facebook Graph Search that allowed him to automate the compilation of a list of some 2.5 million phone numbers. Brandon Copley first discovered this flaw this last March, he tipped off Facebook to its existence so that they could patch it. Facebook responded by saying that it considers it a normal feature and that its up to the users to safeguard their privacy with the tools made available to them by the social network.”]
Source: https://informationsecuritybuzz.com/news/data-slurping-facebook-graph-search-flaw-revealed/