It might be enough to use standard turret missiles, if the guerrillas have access to them. Those might not be good if the SDBs are in orbit, but in orbit, the SDBs are limited to being ortillery, which might be less effective than if they flew down lower, so they might work as a deterrent. Of course, they have to have access to the missiles, which is easier if the local TL is high enough to make good enough missiles. Potentially, if the guerrillas have enough resources, they could get something set up with the firepower of a bay, whether that's the size of the missiles or the number, but then that would probably become a high-priority target.