How to unbind from active directory while preserving a user account?

1. Login to a different admin account.
2. Delete your account, choosing "Don't change the home folder" option.
3. Open Terminal and rename your home folder, eliminating the " (Deleted)" part -- sudo mv "/Users/yourshortname (Deleted)" /Users/yourshortname
4. Unbind your machine (Login Options tab, at the bottom)
5. Create a new account with the same short name.
6. Use the existing folder, when you're prompted.

An update to my comment of Sep 6 at 15:24 and part of #4 -- Apple has just issued a supplemental update that fixes this loophole. The text of their security announcement is:

APPLE-SA-2013-10-03-1 OS X v10.8.5 Supplemental Update

OS X v10.8.5 Supplemental Update is now available and addresses the following:

Directory Services Available for: OS X Mountain Lion v10.8 to v10.8.5 Impact: A local user may modify Directory Services records with system privileges

Description: A logic issue existed in Directory Services's verification of authentication credentials allowing a local attacker to bypass password validation. The issue was addressed through improved credential validation. CVE-ID CVE-2013-5163 : the rookies of 42