Facebook CEO Mark Zuckerberg appeared on stage at the All Things Digital conference, and was quizzed on a variety of important privacy concerns that have been highlighted in recent months. Zuckerberg admitted that over time Facebook’s privacy settings had become too complex. “Privacy is a really important issue for us and for the Internet. We spend a lot of time thinking about these things.”, Zuckerberg said. When questioned on “opt in or opt out settings,” Zuckerberg was insistent that Facebook asks users to control their privacy settings. “We ask that people review their settings and make a choice for what they want their settings to be”, he said. Zuckerberg admitted the company has a hard time building products that people use to share information and ensuring that all the products have privacy settings that users can control.