Nobody hacked into any database. It was an exploit of PHP-Nuke. I have yet to find an answer to it. But I made one for myself.
So if the would be hacker is out there reading this, try it all you want. You can't get anywhere. I removed any files that you need to get to in order to change this site. So ha! Make as many admins as you want, they are useless with no admin page! HAHAHAHA
As far as people getting your email address, it is on every post you make. If you don't want anyone to see it, go to the link at the top of the forum called Profile. Click the radio button next to "Always show my e-mail address:" and make it say no. Simple.