A "Public" Forum is no worse than Myspace or Facebook.
You can also opt to have your screen name show up to everyone by adding it under the User Options (see the little AIM icon in the corner of people's names?). How is typing it out in a thread any different?
Now email is a different story -- often times people set up searches for emails in forums, and then send them spam.
"Can I bring my pet fluffball with me or might he be anally raped by a spoon in the middle of the night?" -Dia