Just as a thought exercise, the better kill switch is a dead man switch that is disarmed every month or two until its next run, also one that acts as malicious ransomware that deletes everything including itself and all logs.

Obviously don't do this, because you don't want to be more morally bankrupt than your employer, or your whole argument of righteousness falls apart. The morally righteous never would, because they already know that employment in the US is voluntary for both sides. Also, over time, one would absolutely forget to disarm it.