From what I understand both Fable and GPT have been trained on "the internet" so that brings to mind something that may not be as well-addressed.
Back to the original premise, wouldn't some training material trend toward putting the deed on Youtube or even more likely live streaming in order to get more attention than if no one were ever watching?
Maybe these nearly opposing forces are always at work beneath the surface, and when they balance out the default is to "sneakiness" as the prominent behavior to be detected if possible?
“Who knows what evil lurks in the hearts of men?…The Shadow knows!”
https://www.radiohalloffame.com/the-shadow
OTOH, superintelligence might be expected to know more than any one person.