"We use Facebook only for identification. No sharing without your permission (promise!)"<p>While Lookmark may intend to follow all honorable practices, I'm curious if there are things Facebook can decide to do to subvert this.<p>IOW, does Facebook track the use of an account for Lookmark identification? Are they tracking when a user signs in to Lookmark?<p>Just how much does Facebook get to know about a user's use of Lookmark?<p>Thanks, BTW, for offering a non-FB way to sign up.