I hadn't put my finger on it, but this does seem to be happening a lot. Thanks for calling it out.
There's so many layers of things that the world has not even begun to come to terms with, and LLM participation on the web is one of the main ones -- a variant of enshittification that wasn't really possible till a year ago.
Think about this: SN has tools to deal with this in a way almost nobody else does. But it also, I guess, is vulnerable in a way that nobody else is? E.g., there's no other site where you can earn actual money for this kind of behavior. It's both a honeypot and an anti-honeypot.
Yet another way SN is on the frontier.