Hmm I had never considered that before.
Well right now it autofills without robots, right? So it's kind of a cheat, but the game isn't very realistic anyway you can place down 200 turrets in a few seconds. Whether or not they come "pre-filled" with ammunition or not doesn't really change the realism factor.
So my question is why should blueprinted entities behave differently?
Should I make the mod autofill blueprint-robot-built things just the same as player-built things?