I have an extremely unusual first name. So much so that there's only about four of us in the country right now.
I do NOT use my real name on ANYTHING online other than placing orders through secure servers.
Yet, if I google the appropriate screen names, I can find stuff I posted on UseNet over ten years ago.
I was followed to this board by someone using my then email address. I had to change my screen name on this board (actually twice now, to avoid posts here being cross posted elsewhere.
I do not and will not use social networking sites simply because it's too easy to track me down.
To make matters even worse, the last four digits in my SSN are sequential, so I've got to watch out for that (identity theft) as well.