Hell, even if you heard "STOP" during consensual sex, it could mean a lot more than "get off of me, you brute":
1. "Stop thrusting, I'm getting chafed, let's rest for a minute."
2. "You're pulling my hair, you oaf."
3. "I heard something strange, wait a sec so I can listen better."
4. "Wait, you're about to finish and I need more time."
5. Or, like the punchline to an old joke, it could mean "wrong hole, wrong hole!"
Etc., etc. The word "STOP" is often ambiguous itself, inviting the question, "um, stop *what*?"
Heck, I've heard my wife say "STOP" during sex, and she was telling the dog to stop bugging us.
I will agree that "no means no" regardless of anything, no arguments or situational ethics.. they don't apply.
But this is splitting hairs.
It's ridiculous.
While I would honor such a request, out of respect..
The person who put me in that situation would never darken my door again. That's certain.