i would not be so fast to claim his story false - maybe you should read through the description of this airport update: http://docs.info.apple.com/article.html?artnum=30
...A heap buffer overflow exists in the AirPort wireless driver's handling of scan cache updates. An attacker in local proximity may be able to trigger the overflow by injecting a maliciously-crafted frame into the wireless network. This could lead to a system crash, privilege elevation, or arbitrary code execution with system privileges. This issue affects Intel-based Mac mini, MacBook, and MacBook Pro computers equipped with wireless....