
Quoting
flyingron
You're going to have to explain what you mean by that.
Harassment is not assault. This adds to the confusion when you bend the terms like this. Anyhow, unless you're trying to achieve some money or other personal gain from the person, threatening to report them to the police is not a crime at all. Of course, YOU can't have someone prosecuted. All you can do is make a complaint, it's up to the state in the form of the police, DA, and the courts to determine if the person is prosecuted.
The law is not your elementary school sandlot. Being an aggressor or not neither makes a criminal activity nor excuses it.