It will be an balancing issue, lot's of people fly exclusively one plane. If you don't have a Radar and are not 100% sure somebody is an enemy - you don't shoot! Simple as that. In the same vein, a Blue F-15C, locking & following an Blue A-10C can't whine if that poor dude plants 4 Aim-9's into him.
I repeat, Teamkills are 90% people being dumb, the other 10% is a Fox 3 / 2 tracking the wrong guy. :)