Facebook COO Sheryl Sandberg has been slammed as 'shameful' after defending the firm's controversial research app and claiming teens 'consented' to having all their activity monitored. The social media giant's controversial 'research' app, got Facebook's app permissions revoked by Apple and raised the ire of employees inside the company. In an interview with CNBC, Sandberg said Facebook pulled the app after it 'realized we weren't in compliance with the rules on [Apple's] platform.' However, it was Apple who yanked the 'research' app from its App Store, not Facebook. Apple decided to ban the app, formerly known as Onavo VPN, from...