This is a hypothetical question. If someone gets control of your machine and you have to reinstall OS X, would you also need to change the passwords for your Airport base station and network? Also wouldn't you need to do this AFTER you reinstalled OS X because only after a clean reinstall could you be sure that the hacker wasn't getting the new password? If you changed the password without cleaning your system, couldn't the hacker get the new password also? I guess it all depends on the exploit. But I was just wondering if anyone could answer this so I would know what to do in a situation like this.