Can you tell me how to spot them? Are you using tools to this determine the AI user?
Or it is simply because they are having low-quality posts means they are using AI bots on posting here in the forum.
Low quality posts doesn't denote/connote that the post was written by an AI writing system, individuals can write low quality posts off their own head/knowledge. Out of ones own intuition, they could spot a post that looks like it was written by an AI bot, but it is somewhat difficult to be certain, even with the aid of detectors. The thing is, if you suspect a post was written through that means, report it.
but on this AI bot, I don't know if they exist on this forum.
It doesn't exist on the forum per se, people who don't want to be unique and post things out of their own knowledge use it to make posts on the forum, though it is against the rules.