If this is still true you can reverse the roles Samba and Linux usually play in these cases:
Do not allow guest access but do "Allow others to create and delete files in this folder". This will cause everyone to have to provide credentials to gain access but it also allows Samba to know who everyone is.
drwxrwxrwx 15 creepwood media 4096 May 3 00:17 /home/creepwood/media
Now change the permissions to 775:
Now the "ls -dl" command for tht folder should read:
sudo chmod 775 /home/creepwood/media
Creepwood and members of the "media" group will be allowed write access.
drwxrwxr-x 15 creepwood media 4096 May 3 00:17 /home/creepwood/media
Everyone else can only read.