Players place a turret outside in front of the base area, break one wall, all NPCs run out, and the turret kills them. Is it possible to change this?

set this false Allow Players To Build

I have "Allow Players To Build" - false. Players build outside the zone and place a turret. Then they break big walls, and the turret kills NPCs

i don't see the issue? this is vanilla behavior. changing this would require the addition of a very heavy hook and it simply isn't worth the hassle