Shrunk to tiny-point type and colored white on a white background, the text appeared to be an attempt at prompt injection, with the plaintiff, Matthew Elliott, seemingly hoping to shift the court’s favor after earlier arguments he raised were defeated.

The plan didn’t work, but Elliott faced modest sanctions anyway because he continued adding hidden text to filings even after the court warned him that he could face penalties for what was ultimately deemed a “serious litigation abuse.”

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The person who did it represented himself and used AI...

However, he seemingly took pity on Elliott as a pro se litigant who seemingly was convinced by an AI system that his arguments were ironclad and declined to order monetary penalties.