The Battlefield Franchise Website has word that there are hacked ranked servers online for the military shooter sequel allowing player to pad their stats. They are asking users to help track these down:

It has been brought to our attention that there are hacked ranked servers running which allow the artificial increase of player scores. We are working with all parties involved to shut these servers down, prevent further use of the ranked servers for padding purposes and resetting those player accounts which have been found to be stat padding.

Please be vigilant when connecting to a server for unusual behaviour including extremely short round times and excessively high scores by others on the server. If you suspect the server is being used for padding purposes please disconnect and report the server IP address to EA Customer Support at http://support.ea.com