Everyone social network user has at some point typed something they knew they’d regret sharing and has promptly erased it before clicking “post.” However, Slate’s Jennifer Golbeck reports that these discarded thoughts don’t completely disappear — rather, Facebook uses a code that keeps track of every time you delete a would-be message and sends metadata about that message back to its own data bases. Just what is Facebook doing with information on these non-posts, you ask? Golbeck cites a new research paper written by Facebook data scientist Adam Kramer and Carnegie Mellon Ph.D. student Sauvik Das that examines the reasons for Facebook users’ “self-censorship” and takes a look at millions of users’ “aborted status updates, posts on other people’s timelines, and comments on others’