Facebook CEO Apologizes for Ad System

Facebook CEO's apologized today for the company's new advertising system and told users they can disable it, the Wall Street Journal reports. The system, which tracks users' web activities, raised a firestorm of complaints over privacy concerns. "We've made a lot of mistakes building this feature, but we've made even more with how we've handled them," Mark Zuckerberg wrote on the company's blog.

Zuckerberg says Facebook did not take privacy concerns seriously enough at the outset. Still, critics worry about the increasing use of user information listed on social networking sites for marketing purposes. "This (apology) is an attempt to hope the privacy mob will simply disappear into the digital ozone," said a consumer advocate. (More Mark Zuckerberg stories.)