Ask HN: Why are we safe from botnet-powered vexatious litigation?

Some 2000s science fiction (off the top of my head there's Accelerando, Chicken Little) predicted that AI technology would produce a rise in automated spam litigation by companies targeting each other, as AI became capable of creating convincing-looking fake or throwaway plaintiff identities which could file dozens of suits to rack up legal costs without being easily traceable to the originator.

We've avoided that negative outcome, presumably by some kind of technical expertise in the legal system. Is it a well-defended attack surface today, or is it something we're safe from through obscurity?