I turn them off entirely. I'm playing Factorio to make trains and things to make the trains train about the place. Ain't got no time for random critter waves.
Well... When you level up a bit, your trains become an unstoppable bug-mashing barrier around the perimeter of your base. The bugs try to cross the tracks and SQUISH! No more bugs. No need for turrets or ammo, just trains.
It's the Factorio equivalent of the mine cart blender room trap in Dwarf Fortress, certified to kill even clown invasions.
It's the Factorio equivalent of the mine cart blender room trap in Dwarf Fortress, certified to kill even clown invasions.