I vaguely recall seeing a similar thing about Milgram's Obedience experiments. The experimenters allegedly broke protocol by prompting the subjects too many times or bullying them, rather than using the prescribed neutral prompts.
>The experimenters allegedly broke protocol by prompting the subjects too many times or bullying them
and thus showed that "prompting the subjects too many times or bullying them" still makes people to follow the prompts and deliver the shock where "prescribed neutral prompts" weren't enough.
However, I can't remember where I heard this.