It is still best to move the forum and place it in a private folder if possible. All the passwords are encrypted, however, if the hacker gets hold of the ASP files and the database he will have a better chance of hacking your forum.
Another factor is that if your database can be downloaded it invites people to do so and may use up your bandwidth if you have a large database.
There are a few other reasons well, but considering how easy it is to move or rename the database, I think the above reasons make it worth it!