An OnlyFans case that is ongoing now the plaintiffs attorneys made a filling with i believe entirely fabricated case references:
https://www.courtlistener.com/docket/68990373/nz-v-fenix-int...
https://www.courtlistener.com/docket/68990373/nz-v-fenix-int...
What's interesting about the rules of civil procedure is that it has been built up over centuries to prevent all kinds of abuse by sneaky, clever, unscrupulous litigants. Most systems are not so hardened against bad faith actors like the legal system is and AI just thinks it can pathologically lie its way through cause most people trust somebody who sounds authoritative.