Thanks for mentioning this. I installed the attached patch to fix the problems 
that you mentioned, except that I didn't add a section on storage media, data 
remanence, and data forensics (partly because a lot of this stuff is secret).

If someone would like to contribute text in that area, it would be a good thing 
to have (if only to discourage even more users from using 'shred' :-). In the 
meantime I'll take the liberty of closing the bug report.