Well, why not NPCs instead of autocannons? They serve exactly the same role, fill out the armies, are more fun to kill and are more in line with the lore anyway (no AI). And if you get detected, they sound the alarm. There's your notification. I feel like using autocannons instead of NPCs would be a waste of potential. A squad of guardians or servitors would be just as sufficient as a base guarding mechanism. EDIT oops mixed up my thread. This is being discussed to death elsewhere. Point still stands, though.