I think many of us park our cars by taking cues from the position of the car in the next lot. For instance, I like to judge the perpendicularity of my car by making sure it is parallel to the next car. The problem is that if the car beside me is parked slanted, my ride will end up that way too. However, I will ensure that at least my car will not eat into the parking space of the consecutive lot before I shut off the engine.
The situation described in the top paragraph is particularly relevant to parallel parking lots. During my weekend runs at the Big Splash, I have occasionally observed a few consecutive cars parked out of their defined space along the row of parallel parking lots. On one of these occasions, I saw a car with a piece of paper on its wiper. The statement on the paper was, “Please park your car properly”. Perhaps such gentle reminder is good.