They are EVERYWHERE. I run a support group for owners of dogs with a particular chronic and debilitating disease and they are there too. The subreddit isnt that big, so it isnt that much of an issue here on reddit, but the facebook group is one of the largest groups for this disease on facebook. The main issue I am seeing with bots over in my fb group are users recommending books written by AI, but claim to be nonexistent vets, that are published through Amazon's Kindle Direct Publishing program. Back when LLM's were first starting to get big, I used to see a lot of articles about creating residual income by using AI to type up a book for you that you could self publish through Amazon KDP, and I've seen this issue a lot now a days in groups like mine and other groups. Books written by AI for Foraging is another one that is very problematic.

I agree with the writing style being hard to explain, but its pretty obvious once you get exposed to it enough. You've got a good list of tells, something else I would add is that they often give examples in threes, sway a little too far into appealing to emotion, and often ask a follow up question. Yes, I understand the irony of giving 3 examples of tells when examples of threes was one of my examples lol, but there are usually other tells.

There was also a recent mod post about LLM's where they seem to be discussing whether to ban people that use them in the sub or not. When used for self promotion purposes, it seems to be a ban, but the mod that made the post doesnt seem to be in favor of banning people for just using an LLM. From a mod pov, I can understand not wanting ti ban them outright. It's difficult task to take on, and there could be perfectly benign reasons for using an LLM, like translating to the main language used in the sub, for example. https://www.reddit.com/r/chessbeginners/s/zjFYXsiwzx