Scrub free disk blocks

[Bruno Wolff III]

On Sat, Aug 28, 2010 at 13:05:08 -0500,
  Steven Stern <subscribed-lists at sterndata.com> wrote:
> 
> I can think of a few reasons:
> 
> 1) You're running Linux in a virtual machine. Zeroing all free space
> makes it easier to compress the image file.
> 
> 2) You've been looking at something "bad" and want to make sure all
> traces of it are gone before the lawyers/cops arrive.
> 
> There are probably other good reasons, but I'm stalled out here.

You don't like nosy people snooping on your stuff.

You had proproietary data on your machine previously and you need to be sure
it is gone now.