So here another one:
In a European supermarket, I spotted a promo of their loyalty points on bio rice cakes.
Now anything bio, turns me off, but I spotted loads of points if you purchase one.
The promo started that day, but overlapped with another promo ending that day which gave double the regular amount of miles when converting those shops loyalty points.
In short, I needed to buy as many as I could.
There were 74 in stock.
I paid at the cashier, and was mentally planning which other supermarket of this brand I'll go to, to buy more.
Suddenly a thought popped up: Why to look for another store, when I can just walk in the store with the same bio rice cakes, and just pay for them again.
I was nervous that on their system a warning would pop-up that this item was no longer in stock.
No such warning came, and so I walked many times back into the shop.
I started getting too many stares, so a friend of mine that walked in the shop (the type that was never fitted with the "shame-module"), I asked if he could do the walk a few times as well.
Conclusion, for very little money, my family traveled the next 2 years all over the place in business class.
The accountant of the store will be a free man on November 2034 after having been charged for fraudulently selling more than available. [just kidding].