I don't think the em dash is nearly as good of a tell as you think it is – largely because I use it all the time. Likewise for the single quote, they use it thr

I don't think the em dash is nearly as good of a tell as you think it is – largely because I use it all the time. Likewise for the single quote, they use it throughout so I'd wager it's either a stylistic choice or their blogging platform does that automatically.