Well, obviously you were angry (or at least disapointed) because you made multiple posts about your "progress" in tracking down a Wii. Obviously you have a bit invested in the venture.
My point is that launches suck as much for the employees as for the customers. As much as you guys were cranky for having to sit out in the cold one morning (of your own free Wiill no less), the employee was no doubt cranky because for the last month he's had tons of people ask him about the Wii and PS3.
It's not worth your time to go on a witch hunt after this guy, especially since he didn't cause you any real harm, and he certainly wasn't the reason you didn't get a Wii. Your time is better spent elsewhere, be that having your Mom drive you around looking for a Wii or something else, I don't know.