I have done this, in-game. I taunted the AI director to prove he didn't exist, and was rewarded with a tank.
I still don't believe in the AI director, but I've stopped taunting him when playing on expert difficulty. Make of that what you will.
Shamus Young is a programmer and writer by trade, videogame nitpicker by inclination. If you have the patience for more of his ramblings, they can be found at ShamusYoung.com.