Zuckerberg

It’s there, in one article. In “Mark Zuckerberg’s testimony to Congress: the key moments”, Zuckerberg is quoted as answering: every single time you go to share something on Facebook, whether it's a photo in Facebook, or a message, every single time, there's a control right there about who you're going to be sharing it with ... and you can change that and control that in line. The issue is right in the “there’s a control right there” part: what other humans can or cannot see about you inside Facebook does not matter at all.