Zuckerberg needs to face Facebook's problems

The Cambridge Analytica data exploitation scandal could yet prove to be a fatal blow to Facebook's fortunes (and that’s not in direct reference to its share price in the last week.)  
But while the captain of the Titanic cottoned on to the inevitable soon after hitting that subtle iceberg, Mark Zuckerberg appears to be planning to sail on regardless.
Can he really be so unaware that Facebook might be going down? There’s certainly no direct PR move that seems to be capa