I fail to see the point of parking somewhere, then moving to take the parking spot of someone who left while you were still in your car. Yay for you, you just got 3 spots closer to the door.
:P This just drives me up the wall. Or when people see you walking to your car, so they drive around a 90% empty parking lot until you pull out, then take your spot. When there was an available spot 2 spots down. This is the bane of my weekend working experience.