It is pretty hard to get kills without tracers on in a manned ack. The bigger problem is that the enemy can see your tracers even when you can't.
This is especially annoying when you actually
want tracers off in a field gun: as in when there is a swarm of vulchers all over the runway. I shoot down one plane and as he's tumbling to the earth, ten other vulchers who saw my tracer stream (that shouldn't have, being that tracers were off) killed me before he hit the ground.

Please fix this HTC.