First off,  I'm getting really tired of these articles calling things "bugs" or "glitches".   That's lazy reporting.   How did it happen?  Why did it happen?   What new feature were they testing?  Why would that change people's privacy settings?  Get in the weeds and do some reporting for once! 

Second, isn't it so bizarre that this kind of thing never seems to happen the other way,  where things are accidentally set to private?  Oh wait,  I forgot about this Mark Zuckerberg quote:

Screw this garbage company.