I should have been more clever with a more split identity from the beginning...
That's exactly what I did. However, even that's no real guarantee. I've been very open and candid in my participation at DC, so there's enough there that somebody could suss out who I am if they knew a bit about me - and then read some of my posts here. (I tend to be consistent in my beliefs and opinions. And we all have certain favorite verbal expressions and quirks that serve as "markers" for who we are.) Plus there's nothing to prevent somebody from 'outing' me either by accident or design.
I think, in the end, there's really no such thing as complete anonymity if you're going to use the web for anything other than browsing. At least not any more. In my case, I try to minimize my footprint on the Internet to avoid casual prying eyes. But I have no doubts anything I do or say could be traced back to the "real me" if somebody bothered to allocate the small amount of time and resources it would take to do so.
And as iphigenie
so aptly pointed out, for many (if not most) people, the drawbacks of such faux
privacy often outweigh any of its largely imaginary benefits.