In May computer science and math student Aran Khanna built a browser plugin that used the fact that people who use FB Messenger share their location by default. Upon installing the plugin, users could track movements of anyone they were in a conversation thread with, including strangers.
The App went viral and was covered by the press and elsewhere. But 3 days after he launched it Khanna disabled the plug in as ordered by FB. The company then released a new version of Messenger a week later.
A few days later Facebook cancelled Khanna’s internship, and when asked to comment FB said the mapping tool scraped FB data so it violated their terms to protect people’s privacy.