https://www.theverge.com/interface/2019/3/6/18253922/facebook-privacy-meaning-implications-mark-zuckerberg-pivot-analysis-interface-casey-newton

By 2015, Mark Zuckerberg had grown uncomfortable with his messaging history. His old instant messages had gotten him into trouble in the past — people are still tweeting juvenile IMs from his college days — and the 2014 Sony hack had made him more concerned about his potential exposure. And so Facebook’s CEO took a step then unavailable to any of the 2.2 billion other users of his platform: he snapped his fingers, Thanos-like, and the messages disappeared.

Some of Zuckerberg’s correspondents noticed that their old conversations had suddenly become one-sided, and eventually told TechCrunch’s Josh Constine, who broke the story last April. There have been plenty of Facebook data privacy scandals over the past couple of years, but none bothered me quite as much as this one. As I wrote here at the time: