Just Following Orders: Averted – despite being less inclined to this sort of thing anyway, if we take a moment to imagine an in-universe rerunning of the Milgram experiment – Imperial Service training and even basic ethics education makes it very clear that this will not be considered an excuse for anyone, of any rank, ever – and it is specifically never wrong to disobey an illegal or unethical order, even in the extreme cases where you have to shoot the issuer of said order in order to disobey.

Those who have volition and the capacity for ethical reasoning are expected to use them. Or else.