A couple of years ago I tried this with a random selection of usernames to see if this was true. About 70-80% of the time I could find the users real name and address within about 10-15 minutes.
I’d be curious as to what you (or anyone else) could find about me given,
a) I’ve tried to separate my account here from personal details generally and,
b) In Real Life I’ve got an Internet footprint the size of Belgium.
And also, you know, I’ll abuse privs if you work it out. (-: