Anybody else being annoyed by all this focus on em-dash use to detect AI? In no time, the bad guys will tell their BS machines to avoid em-dashes and "it's not X it's Y" and whatever else people use as "tell-tale signs" and eventually the training data will have picked up on that too. And people who genuinely use em-dashes for taste reasons or are otherwise using expressions considered typical for AI are getting a bad rep.
This is all just demonstrating the helplessness that's coming to our society w.r.t. dealing with gen AI output. Looking for em-dashes is not the solution and distracts from actually having to deal with the problem. (Which is not a technical but a social one. You can't solve it with tech.)