According to a USA Today/Gallup Poll released this week, 70 percent of Facebook members are "somewhat" or "very concerned" about their privacy. Take into account the site's <a href="http://www.cio.com/article/508121/Facebook_Bible_Everything_You_Need_to_Know_About_Facebook?page=3">past privacy flubs</a> and it's easy to see why: a <a href="http://advice.cio.com/kristin_burnham/13740/how_to_handle_newest_facebook_privacy_breach_relax">privacy breach</a>, prevalent <a href="http://www.cio.com/article/507502">"scammy" apps</a> and <a href="http://advice.cio.com/kristin_burnham/10398/facebook_privacy_flap_it_takes_two_to_make_this_right">constant change</a> keep Facebook users on their toes.