Folder permission issues

Hi all,
I ran into a problem where in my folder structure, I need users to
have no write access to the root directory.
They need to be able to have read/write access to sub-directories
however, and the problem arises when they accidentally move a folder
from the root directory into another.
They won't be able to move it, because they don't have write access
to
the root directory, but the contents of the sub directory they've
moved have been moved across to the other sub-directory.

Is there a way around this?
I really need some help. :S
Using Windows 2003.


Help!