Fighters are tractor beams

[PvK]

Jim, part of it is affected by whether the strategy says to target seekers and fighters (and drones) or not (assuming there are any to target). If you set those to "no", I think you will not see the ships moving to use PDC's on those types. They will however still use the PDC's on seekers and fighters (and in the upcoming patch, on drones), if/when they move within range.

PvK