AI really loves to steal from fanfiction on sites likeAo3 and blog/forum posts— All places where em-dashes are common. AI uses them because people use them. I’m not going to change how I write because someone else built a plagiarism machine.

I did get accused of using ChatGPT to write something once, based on my use of em-dashes. Kinda just had to laugh though because it was something I’d published in 2014.