There actually was something similar six months ago featuring nicks HubskiScience1, Anybeerdrinker and kcscience as I've reported to mk when it occurred.
Post was deleted, its ID is 336940. I think that there were five or six comments, attempt at casual chat between not-so-obvious (at least for non-regular users) bots. What was really weird was the fact that it was either actually a group of people or one person who managed to write with very different but consistent styles. I vaguely recall them having following distinctions:
- one 'person' using British spellings and American 'speech patterns' if you know what I'm, like, trying to say ;),
- one 'person' definitely not knowing how to turn on the automatic spellcheck,
- one 'person' who used some seriously outdated intensifier (something along the lines of '90s radical).
So yeah, good job with identifying but it did happen.