Or else they really have to crack down on boosting. I earned my 140 assassinations legitimately. I even have saved films of most of my assassination games to prove it. Yet, as it stands right now a group of players can go into Regicide and boost for assassin mastery, among other things to cheat the system.
http://www.gamefaqs.com/boards/632877-halo-4/64671464
http://www.gamefaqs.com/boards/632877-halo-4/64620055
^ People are seriously doing this, and it’s no surprise.