hacker.org

I feel like I'm asking this of hacker mecca, but as of yet no response. Does anyone know any information pertaining to this question at all?

Thanks

In other words, what personal information can be gleaned from just having a person's email address?

For example, the email address: ra0v@yahoo.com

What information can you find on this address? (It's an old one of mine, I'm just curious as to the privacy associated with a free email address).