Zuckerberg's and Sandberg's response to all these events has been the weakest and lamest that I have ever seen from any leadership, regarding controversial issues that involve a company of this size...and that's hard to beat when you have the likes of BP and Volkswagen... Do they really think that just ignoring the issue will make the problem go away?
This problem may be both existential and intractable for Facebook to solve, which is why they have been giving it the silent treatment. I believe the operators and investors are just now realizing how damaging the business model was for consumers.
When have they really ever had their feet held to a fire on a controversial issue? Zuckerberg is still a pretty young guy, despite his position and all he's done he's still inexperienced in some things. Ever since he started Facebook things have pretty much gone his way. Maybe he just doesn't instinctively know what to do.