Revenge is a tricky thing. On the one hand, when you've been wronged, it's human nature to seek some kind of personal restitution.
On the other hand, it's also human nature to not want to appear to be a scorned maniac who pees in coffee pots and slashes tires every time a fast food restaurant screws up your order. It's a fine line.
Still, sometimes people go so far above and beyond for their acts of petty revenge that you can't help but stand back and admire it.