My tool does have a second component - linkmaze - which generates a bunch of nonsense text with a Markov generator, and serves infinite links (like Nepthenes does) but I generally only throw incorrigible bots at it (and, at others have noted in-thread, most crawlers already set some kind of limit on how many requests they'll send to a given site, especially a small site.) I do use it for PHP-exploit crawlers as well, though I've seen no evidence those fall into the maze -- I think they mostly just look for some string indicating a successful exploit and move on if whatever they're looking for isn't present.
But, for my use case, I don't really care if someone fingerprints content generated by my tool and avoids it. That's the point: I've set robots.txt to tell these people not to crawl my site.
In addition to Quixotic (my tool) and Napthenes, I know of:
* https://github.com/Fingel/django-llm-poison
* https://codeberg.org/MikeCoats/poison-the-wellms
* https://codeberg.org/timmc/marko/
0 - https://marcusb.org/hacks/quixotic.html
1 - I use the ai.robots.txt user agent list from https://github.com/ai-robots-txt/ai.robots.txt