This won't really be necessary, but this would add more excitement,Fun and activeness to those competitive players in game since everyone or most players really care about their stats this would also motivate Players to be more active, Plus this may encourage Newbies to keep playing PTP..
So, How about adding a Rank/Level/Badge on the Registered players who successfully done their duty based on the experience they get each game.
Ex. If the President survived. The President, VP, Secs, Cops and SWAT get points. If the President died. Terrorist get points.
Once again this won't be necessary.