Facebook on Thursday began rolling out its privacy checkup aimed at helping users of the huge social network better manage sharing their information and postings. The new system uses a blue dinosaur to guide Facebook users through its maze of privacy settings for personal information and for sharing their posts. We know you come to Facebook to connect with friends, not with us, Facebooks Paddy Underwood said in a blog post. Facebook announced the plan in June in its latest response to concerns about privacy, following criticism over its data mining practices for marketing purposes.