I've long contemplated the book The day of the Jackal by Frederick Forsyth

There is parts devoted to ID fraud if you will

There was a BBC documentary a while back where the presenter showed Frederick a credit card, driving licence and passport, all in Frederick's name

The presenter did this by obtaining a birth certificate and assuming the identity and applying for all of the said documents and then changing the name to the author.

I personally believe Hal, loosely based on these lines, created the SN pseudonym, albeit a digital only presence

And continued to interact as Hal and SN during online discussions

As soon as GA went to the feds, he dropped the iconic...

I've moved onto other things

Unfortunately life was waiting to throw ALS at him