This is a very cool and needed hack!
One strange result I got:
>From: **DONOTDELETE**
>I seem to have multiple personalities using ID numbers 1234 and 1
>sharing the same computer.
How can it happen that some user could login as User #1 DONOTDELETE
Is this a bug in the hack's code or is there a user using some sort of side entrance to threads nobody was aware of yet? - By the way: I have deleted only 2 users. I am pretty sure this one was not amongst them.