There's some fishy leaderboard scores that seem to blow out everyone else. Scores from Rookie or Normal Difficulties, very long completion times and assault/panther playstyles beating out fast pure ghost runs. One guy in particular is sinon761012.
This is for the PC version of Blacklist.
http://gyazo.com/3b01a711a68584d7518ebf2fa56f113e.png
http://gyazo.com/f181295f26a8da4ee814c5c6d765ecfb.png
http://gyazo.com/ab71759d3f13a60fcef8427e25e9ca4c.png
This is for the PC version of Blacklist.
http://gyazo.com/3b01a711a68584d7518ebf2fa56f113e.png
http://gyazo.com/f181295f26a8da4ee814c5c6d765ecfb.png
http://gyazo.com/ab71759d3f13a60fcef8427e25e9ca4c.png