The "View As" feature has caused a massive vulnerability in the past: https://techcrunch.com/2010/05/05/video-major-facebook-security-hole-lets-you-view-your-fr

The "View As" feature has caused a massive vulnerability in the past: https://techcrunch.com/2010/05/05/video-major-facebook-security-hole-lets-you-view-your-friends-live-chats/ https://techcrunch.com/2010/05/05/video-major-facebook-secur... I bet they're now really regretting keeping it around.