I have. And one of my assistants, Akon, walked by while it was narrating him chewing on celery, which was as profoundly annoying as those spiked piercings he has on his face. I am too lenient with the dress code. I need to burn them all and rehire.
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Motoko mentioned that had happened. If there has been chemical alteration, then I would need blood and tissue samples to confirm this, and they would need to be willingly obtained.
I have the suppressors, but if you are convinced of this, then we may have to take alternate measures. Using science, there are always alternatives.
I mentioned voluntary blindness to Motoko, for instance. But there are other means we can use. I have two spare brains of my own, hidden, in the event I suffer from brain damage. They are perfect backup copies. Perhaps you can consider brain replacement surgery?