Denying Folder Deletion to Users

Hi,
Of course that you can deny delete/move rights from security settings but this mean that the users can't modify/add files if you apply these restrictions at the parent folder and you allow to propagate these permissions at subfolders and files (which is the easy way). A MS Office document require delete rights if a user need to modify it.
The hard way (correct way) is to set permissions at every folder and subfolders without check box marked "allow inheritable permissions from parent to propagate to this object".
Also before setting the permissions you must use "take ownership" at parent folder level with check box marked "replace owner on subcontainers and objects". But any new folder created by a user will have this user as owner and this user will can delete or move it.
I think that you can't maintain under control these folder in this way. You must assign folder for groups, with correct permissions, you need to instruct the users, put an audit on critical folders, a good backup, a undelete software, etc.
On my file server each department have a folder (with permissions only for this group) an also exist some public folders. In this way these groups are the owners of the documents and subfolders and also are responsable for its actions. I help them when they have problems but I don't spend time with the management of this folders.