Hi

Here is a quick run down for u to make sure u keep your info private.

1. When u register just use a nickname not your real name
2. Once your registaration is accepted log in
3. Go straight to your user profile page
4. U will start on the information page make sure the only things on this page are your user name and email
5. Go to your preferences page
6. Make sure the "Allow members to contact me by email" option is set to NO

Ok that should ensure that your real life ID is your own business.
from your profile settings you can also choose an avatar etc if u like.