There are some states with sophisticated enough cybercrime units that they'll be interested in this email.

I checked out a few of your articles (which I enjoy gaiterless) and I wouldn't be shocked if your state is one of them. Sadly, forwarding your email to your state's attorney general's office may be a waste of time, but I'm pretty sure it can't hurt.

Emails have deep layers of helpful clues that CAN potentially identify and trace a user. If you look at an email in Gmail for example by clicking "Show original" from the three dots area of a message you will see just how complex it all gets. That complexity is your friend if the guy is sloppy.

I'm not a criminal lawyer so I don't know if this email measures up to a legal conviction, but when we put guys like this on law enforcement's radar, it may at the very least lead them to his door when they run into him for another reason. We can be sure you aren't the only one he's harassing. He'll slip up and make a mistake. His pattern of harassment may be discovered, and they can use this in evidence.