I dare you to change the default file creation permissions from 755 to something which doesn't have the execute bit set.
Alright, I don't know much about NFS, but isn't there a way to find out if the file you are acessing is a regular file or a directory? Because once you remove that execute bit from the permissions you can no longer search in directories, resulting in a nice "Access denied" for the folder you've just created.
Maybe there should be different options for files and folders. But that's my humble opinion. Anyway, I'm stuck with regular files looking like -rwx-r-x-r-x on my directory listings. I've always wanted to execute a windows backup file on Linux!