I've had a couple of unwanted bots commenting on my posts. One was that "catfacts" bot who puts useless trivia about cats in the comments of anyone who uses the word "cat" as a tag. (Mute #1 for me.)
The other is the "cheetah" bot which gets some respect from what I have seen, but in my case, all it could do is provide the link I'd already provided in my article! (Mute #2.) Another person I've ended up muting because the guy puts useless comments everywhere. He can still comment on my posts though, which is annoying. I know I'm "preaching to the choir", but I know you understand where I'm coming from.