I would think it's up to the person gunning the bomber. It (tracers) already are an option. I tend to shut off tracers when I'm going to jump in a vehicles or bombers because the tracers tend to advertise where you are, if you're in a vehicle as wel as it tells attacking fighters what gun you are manning in a bomber - even when you're firing at them.
-Westy
[This message has been edited by Westy (edited 10-20-2000).]