And just to add a taste to what
Psykogundam was saying.
There is an "optical illusion" that sometimes happens when bullets are fired at you or at least very close to your area. Sometimes tracers round can be seen coming at you from a distance. This is modeled somewhat ok in game. Usually it's when a freakin tank opens fire with the coax gun in your direction
When you first see it, it "seems" to be moving slowly, but as it gets closer to you it "seems" to pickup speed till finally it whizzes by your head SOOOO fast you begin to wonder if you truly ever saw it at all. It seems somewhat surreal is the best way I can describe it.
This however does NOT happen with each and every tracer round that comes in your direction, but it can sometimes be seen if the conditions are right. When that happens just thank God that you are still around to tell someone. "Hey I just saw a tracer coming right at me, so they can say, "yeah right, sure you did".
No one seems to be really certain how this illusion happens the way it does, but it does.
Anywho, with that said. The only ones that can "normally" see your tracers are the ones NOT in the area getting fired upon. Usually they are the only ones with a chance to flank and attack you, so quit complaining about tracers giving away your position, because there are soooooo many more things that will give away your position BESIDES a stupid tracer round. The sound of your weapon firing is a dead give a way each and every time! Or how bout the fact that the player models don't blend in with anything in game, and that REAL camouflage is a joke in game.
The best use for tracers is when the machine gunner needs to "walk the rounds" up into the target area, or when someone calls out, "follow my tracers". Tracers are also helpful to let someone know at which target NOT to shoot. RED=NATO, and GREEN=WARSAW PACT. Or for our purposes GREEN=MEC or CHINA

Trust me when I say, it does help reduce friendly fire issues
