[Dean C]

I wouldn't worry about a thing if I were you. There's a lot of big talk on the internet about hacking, most of the time no-one knows a thing they are talking about. However, do take a backup of your database via SSH every night, add a .htaccess password-protection on your admin/mod folders and make sure your mods change their passwords (and that you do indeed trust them not to leak their info and let someone screw up the board).

And in regards to sueing regarding internet matters, it's not worth the finance in most cases.