I'm a big proponent of fair play and I think the author would identify himself when asked, but at the same time only PG can be sure.
Of course you can be paranoid, but I think the bigger chance is the author seeing a chance here at sowing some disinformation. Such as participating in this thread and giving false pointers and / or confusing the issue.
For the really paranoid, of course the last person to participate in this thread is 'the one'...
Seems like a good thing to verify first. Maybe you already got the guy and he just said "no it's not me."