Doesn't make sense since I wanna block MakeDir, not uploading files. If the dir is not there, no files can be uploaded in it. They would get permission denied on the MKD and No such file or directory on STOR to */DISC1/DISC1 or whatever.
Example:
MakeDir = /DVDR/*/DISC1/* !*
...would mean 'nobody has permission to create a dir inside any dir called DISC1 under /DVDR'
That should be enough.
Edit: Okay, the above doesn't work. Even though I think it should