Originally posted by Eightball:

@warrenchmobile Explained it best; a non sentient object you placed that can determine neither friend nor foe and merely does what is does: shoot stuff.

And I have to call you on your counter argument @Smetrix because the ballista (which is static) even though an active defense versus a passive one, cannot identify friend vs. foe. It is non sentient. Active vs. passive does not inherently mean the active defense can differentiate.

There are no pre-established rules in game that justify this, you guys just made that up to rationalize it lol.