True, there are creative ways to go about mitigating this risk. However I’m not convinced that it’d be so difficult for the slave masters to somehow coerce us into unknowingly communicate some type of mental cues that would allow them to run a brute force style campaign and potentially guess our passcodes. Apple iPhone FaceID, can those same eyeball sensors monitor where on the key board your eyes are darting to/from as you type? This would give a hacker a nice edge unless I’m missing something.