My first thought was that they referred to metaphorically poisonous books, something that scans the catalogue looking nasty books about diversity or gender ... "oh no, more book banning".
My first thought was that a library was writing fake books to poison LLMs that were using their corpus without their permission, and that someone had developed a tool to identify such books.
LOL exactly. If I had a choice between a book burning of these arsenic books, or a book burning of stunning and brave books such as Middlesex, I would absolutely sniff those arsenic fumes, as that would smell better than to silence the speech of the oppressed classes by the oppressors
It's funny how parody, sarcasm and hyperbolic sincerity are all absolutely impossible to distinguish between these days.