I'll quote the relevant part for you:

Here's my best guess for who Slim Virgin's first account was:

I'll say why:

1) Created the Yvonne Fletcher article, just 1 minute after he had made his first edit to Pan Am Flight 103
2) Made many edits to Yvonne Fletcher article insisting that a marksman killed her, and pushing many conspiracy theories about it.  Encouraged links to Joe Vialls' sites on it.
3) Received a new user message on 14 December 2003, yet first edit wasn't until 17 January 2004, suggesting Darkaddress was in some trouble, and had edits wiped from history.
4) Basically stopped editing in July 2004.  Only made 2 edits since Slim Virgin started in November 2004.  These two edits were minor:  and , and were 6 months apart from each other.  This is suggesting that Darkaddress had a sock puppet.

Of course, this is all going with the theory that Slim Virgin is Joe Vialls.  It is just a theory.  It is at this stage a very thin theory, and I am hoping for some more meat towards it.  However, Joe Vialls is the only person I can think of who is an expert on the Lockerbie Bombing and also is anti-Jews.  And, make no mistake, Joe Vialls is an expert on the Lockerbie Bombing.  He is also an expert on Yvonne Fletcher.  Indeed, he is an expert on Jews themselves.  He just happens to hate them, and blame them for everything.  Joe Vialls is also a former policeman turned detective turned journalist and conspiracy theorist.  Supposedly Joe Vialls died last year.  Joe Vialls is extremely secretive, and nobody really knows who he is.  He also likes to sign his name "JoeVialls".  A bit like "SlimVirgin" eh.

A little clutching at straws, I must admit, but it is at least a theory that fits.  Let's see if anyone can come up with a better one.