I'd like to think that NC has more team killing because more TR/VS use Alt characters to purposely teamkill on the NC faction.
Nah, after all, who would make an alt named "NoobgunTKer" or "NotVS" or even every single BR 1 that tries to TK vehicles with V$ or even TK reavers.
Oh, so many bad jokes about NCs...Please be more respectful...It's a balance probblem only !!! It's because of the game !! Here is my own idea : What about a "No Bullet Week" event for NCs ? During a week, they would have empty magazines only...Just to give them time to train without constantly Tking each other ? Save Ferris !!!
No bullet week would never work, you also have to take away knives, vehicles and high edges they could push each other off of.
NC has more friendly fire because they have higher alpha damage weapons, which means that the probability of killing someone by letting of a burst, mistaking a friend for a foe, is higher than the marshmallows that VS/TR shoot.