Re: Exactly...Apple said:
I found a partial solution. It's not ideal, but it will sort of work.
In Mac OS X files are references in two ways. One is aliasing, like in Mac OS 9, where each file has a unique ID, so if it moves it can still be found. The other is symbolic links, which just links to the location eg /Folder A/Folder B/File.
The shared folder that Simple Finder points to is located at /Users/Shared, so to prevent each of the above linking techniques, I couldn't rename it or replace it. So I deleted the current one, and made a new folder with a different name (I called it 'Shared Folder'), and set its permissions so that everyone could read and write, and then set the owner to System (same as the old one). Then the Simple Finder Dock can't reference to it because it breaks both of the above links. Unfortunately, instead of simply removing the icon from the Dock, it is replaced with a question mark icon, but clicking on it will do nothing.
Of course, some users will figure out that you can use command-up arrow in Simple Finder to be able to navigate the whole hard disk (taking permissions into account) and hence they would be able to navigate to the new folder, but it won't be directly linked from the Dock.