Some tarballs dont create new directories.
This can be bad news.

I recently did a rm -rf `tar tvfz blah.tgz` on a tarball that had contained ./ and had made a mess in the cwd

Luckily, the "v" saved me, as I assume rm -rf ./ would be pretty bad.

In my haste, I have not considered how your code would handle this, but it might be good to check.