Accidential Removal and Deletion of files

I saw this post doesn't look there is much luck since they need modify rights to the files if they want to edit them at all

Unfortunately, I am afraid that the requirement could not be met because of
 the way that Office saves files. When you modify and then save a Word
 document, the following happens:
 
1. Word builds a new temporary file using the edited version of the
 document.
 
2. After Word creates the temporary file, Word deletes the previous version
 of the document.
 
3. Word renames the temporary file to the same name as the previous version
 of the document.
 
According to the above work process, we can see that the Delete permission
 is required to modify and save a Word document. In other word, if you
 permit a user to save modification you will also need to permit a user to
 delete the file. Unfortunately, this behavior is designed and could not be
 modified. Thank you for your understanding.
 
For more information, please refer to the following Microsoft Knowledge
 Base article:
 
A description of the way that Excel saves files
 http://support.microsoft.com/kb/814068
 
You receive an error message when you try to save a file in Excel
 http://support.microsoft.com/kb/214073/
 
WD: How Word for Windows Uses Temporary Files
 http://support.microsoft.com/kb/211632
 

If you go to the shared drive, right click properties, security, Avanced, select thr group or user you want and click edit, you can prevent them from deleting, but I'm not sure about moving folders.  Do you have shadow copying set up on your server to revert the folder to a previous version?  I have it set up to take a copy 3 times a day so if a person deletes a file, i can right click the folder, select prevous versions and select the time of the day to go back to.