Never heard this before, and I like it. Derived from Son of Sam, no doubt.
You nailed it. That’s exactly where I got the idea. I never really thought of it as coining a word, but I guess that’s what it was. I have a few entries in urbandictionary.com ,using the moniker Oliver Faltz. My favorite is twitterary, which is one who is hired to do the twitter feed of a celebrity. Pope Francis, for example, doesn’t do his own tweets.