it wont let you edit nothing, not even the passwords if you are not listed in config.php file. it works the same way as pruning the admin log (i got the idea from there). simple and secure.
if i understood correctly, in his hack you still can edit the passwords? not sure. let me know please.
also dont look as doing more, but rather as hacking in a different way.

my hacks are learning tools for myself, while experiencing with different aspects of vB.