"If I'm a bad guy and I see a credit score from a major credit bureau that was just tweeted or shared, the next thing for me to do would be to go your Facebook page, find your email address and send you an email that looks like it's coming from an entity that you might have previously done business with," says Robert Siciliano, an online security expert.
http://news.yahoo.com/why-shouldnt-share-good-credit-score-facebook-154650263.html;_ylt=A2KLOzHjyGhSSVAAAWXQtDMD