This new user seems to be suspicious.

They are answering questions at a staggering rate, with only about 4 minutes difference between each answer. Already answered 7 questions.

They have done the same thing at MO.

Smells like AI again.

Oh wait. Posted another answer. Wow.

And another. 💀

They have started posting at Physics. Same modus operandi.

The poster at Physics confessed:

Their three answers here sure sound AI to me. I commented as follows for all three answers: Was this written by GenAI like your answer at Physics.SE? It sure sounds like it was. If so, you need to disclose this fact.

So, first Luigi M, then Luis G. Next up: Luanne A. Or Ludwig B.

@StephanKolassa lol 😆

@StephanKolassa apparently they have deleted most of their answers already.

Really don't know why they do these sort of mischievous stuffs.

They have been suspended for plagiarism on math & physics. I don't see any non-deleted answers on either site.

An older style of nuisance is stats.stackexchange.com/users/453106/tim-cook who has posted at least three times advertising SPSS help. All promptly deleted but appears to be acting similarly on SO and Academia.

Here's something quite different. Bernhard Flury 1951-1999: born Swiss, peripatetic career, died all too young swept away by a landslide in the Tyrol. His books and papers on multivariate are quite striking. Now here's the unusual trivium. He also published as Bernard, perhaps fed up with English-speakers getting his name wrong. Yet further he published with 5 different second initials A D K N W.

Was that some kind of running joke about the mutability and arbitrariness of names? Or about the habit of giving a second initial without expanding on it? That may remain a very minor mystery. Not quite up to the standard of the physicist who added his cat as co-author because a journal editor objected to "We" in a single-author paper.

@StephanKolassa Thanks for the heads up. Enough is enough; I destroyed the Luis G. account and plan to deal with future spates of AI posting similarly unless some more effective counter can be found.

I typically gauge for lengthy posts akin to mathgen articles. The traits are clear: answer at a staggering rate; unnecessarily long with no pata and answering questions of different fields.

@NickCox ah. Tim Cook. Yes. The very name makes me frown at the posts.

@NickCox wait. I missed the h reading initially. I could feel his plight.

@NickCox I read that somewhere where the cat was made the co author. Very witty.

Alpher and Bethe conscripted Gamow as third author in a paper published on 1 April 1948. I gather that the timing was pure accident.

Reminds me of the famous Tootsie rolls fiasco, which ultimately proved blessing in a disguise.

@NickCox what. 🤣

My god. That should not be unintentionally done!

Hey @whuber, I have another suspicion against a user; I hope I am wrong but I think it would be good if you folks look into their posts.

I had my fair share of doubt against this certain user and am not casting aspersions.

Seeing posts like this really annoys me a bit.

Okay, it looks like something is fishy: they have been already banned in Maths for plagiarism and at MO for ban evasion.

@User1865345 I'll confess I am not good at identifying AI posts: I tend to assess them on their merits and if they're clear, correct, and answer the question, I'm (personally) fine with that. Could you help me out by indicating what you find annoying about that post?

@whuber I agree with you. Some of their posts have been good.

As I said, I tend to look at the pace they answer, whether those are unnecessarily long etc.

And the way they answer and many of their posts fall for these traits.

I noticed the answers at Maths have been removed for "plagiarism".

That's how I could speculate (yes, I cannot confirm).

@whuber please don't generalize any thing I have said. They are definitely not rules. 😅

I have not seen infestation of ai answering this much till now. That's why I am more anxious than ever.

Generally I have noted they hardly comment and answer pretty rapidly.

@User1865345 Understood. I'm just trying to figure out how to spot such behavior and what to do about it. I appreciate your thoughts about this.

@User1865345 An answer just posted at stats.stackexchange.com/a/659030/919 has convinced me of the plagiarism charges. My guess is that their AI has processed my previous answer and simply regurgitated it, in practically the same language! What do you think?

@whuber my only take is that irrespective of the veracity of the answer, if it has taken resort to gen ai, the author should be transparent about it; otherwise it's a blatant plagiarization of not only the content generated by that alleged gen ai, but also the material they borrowed from the earlier version of your post.

It's really disappointing what has been happening of late.

@whuber and yes, I agree with you

I already read your answer few days ago and I have noticed the uncanny signs of it in the said post.

Another general trait of such users is they target three more communities, at least, other than CV: Maths, MO, Physics.

This also matched for this particular user.

Anyways, thanks for looking into it @whuber. Appreciate as usual.