On the plus side, you can hold this iPhone any way you want. It's just another solution to the antenna problem.

This sounds like an early 80s copy-protection scheme that depended on the bad-sector map of the installed hard drive to identify it. It was reliable because only a low-level format would change the pattern, and very few people ever did a low-level format to their drives. The scheme failed when production improved and most drives could be manufactured error-free.

Interesting, but I just enabled the guest account on my XP Home system and tried it. The NET USER username * command gets kicked for lack of privilege. I think any account this works for will also have enough privilege to change all system passwords using the Users control panel. On an XP home system, that will be anybody but the Guest account. I don't have an XP Pro system to test.

So it looks like this is just a command line way to do what you can already do with the control panel.