Did anyone accuse you specifically of doing anything wrong? Why are you getting so worked up? I don't think anyone is upset about the couple of people who have reported to have gone in, asked if they could use it or asked why the discount did not apply and then received it after a manager override. There is nothing wrong with that. But everyone has a point where things turn from an innocent question to one of ethics. Hearing about people teaming up and pressing the issue for an hour or more with a manager is certainly one incident that is taking it up a notch. Hitting up store after store after store until one finds a willing manager to give them a $2,000 discount is more than a little concerning. Those are the incidents that have people talking here. Also, for every story of polite requests that have been approved or declined, you know there are ones where people were rude and demanding, however I doubt you will ever find someone who will admit to such behavior.
For me, once you need to get a manager to override the computer system, the chance of it being something you were not intended to get is pretty high. Not always, but usually. Look at the guy who went to five stores. His words, "All I do know is that I feel lucky that due to their mistake..." He feels "lucky" and acknowledges it was "their mistake". That is not the reaction of someone who honestly thought they had a right to that discount. That is the reaction of someone who knows they got away with something. That is a far cry from your scenario or that of anyone else who has posted their experience so far.