As in the attacker would be able to pop up and attack the original user of @N at will for what might very well be a vicious attempt to take over or destroy as much of his digital holdings as possible.
The grandfather post is referencing asymmetric warfare[0] which would be a pretty decent name for what could happen. I don't think he just threw some cliches into a sentence.
[0] http://en.wikipedia.org/wiki/Assymetrical_warfare
