Disable storage of invisible files "._" on my cfs or smb network storage
I will admit, I hadn't noticed that the defaults write command stopped working in Mavericks.
However, when I DO clean network mounts, instead of your one liner find and rm, I use this:

dot_clean .


The manfile explains:

dot_clean -- Merge ._* files with corresponding native files.


I don't use the -m flag, but you may find it helpful in your situation.

-m      Always delete dot underbar files.


Here is another person actively trying to stop .DS_Store files from being created:
http://www.aorensoftware.com/blog/2011/12/24/death-to-ds_store/ - looks like he doesn't want them on drives as much as he doesn't want them on the network!