I think the ichi thing has no bearing on the "no harassment rule"
That was illegal off site stalking, not on site harassment which is what this rule would prevent, and was illegal behavior, meaning it is covered by laws outside the site and does not even have to be stated as off limits. By definition you can not commit illegal acts on this site. (this does not include claiming to have done something illegal as that is protected by free speech and up to the site owner whether it is on topic or unwanted)