Facebook remains in the crosshairs this week over the Cambridge Analytica scandal. The social media giant’s stock price has fallen by over 13 percent this week. Some of Mark Zuckerberg's fellow tech moguls are taking some potshots at him now. Tesla and SpaceX CEO Elon Musk very publicly deleted his companies’ Facebook accounts. Now Apple CEO Tim Cook is publicly calling for Facebook to be regulated. Cook said the "situation is so dire...that probably some well-crafted regulation is necessary."