update

i have done some testing on turrets with a corp mate to get an idea how the turret AI works
the AI will normal not fire until
A. it is aggroed by being shot
B. a valid target enters range
for blasters this is everything with infantry being primed last
rails is vehicles only however they have a MASSIVE aggro range
missiles aggro vehicles and other installations as well as null cannons (very annoying)

once a turret is aggroed it will stay aggroed and contuine to attack anything that comes into range
the only way to tell if a turret is aggressed is by looking for a small lazer that runs along the barrel this
when this is green a turret will not attack once aggressed this turns red

if a target aggresses a turret and moves away the turret will stay aggressed for about 30s before returning to its rest state if the target moves back into line of sight before this time no matter how far they may have traveled the turret will almost instanly begin to attack this is why turrets appear to track through walls

will have more info after farther testing