Years ago my friends and I were going out drinking to a bar in an area with almost no parking. We cruised the lot and found nothing, the only available spots were handicapped spaces and one idiot who parked a Camaro across two spots like that. We wanted the spot, so we moved the Camaro. It's not that hard with 3 or 4 guys, you all bounce the car on its springs and on the upward rebound the car gets really light. If you do it right you can move the back end about a foot on a bounce and the front a few inches. Bounce-bounce-shift, bounce-bounce-shift. We moved the Camaro over into a single spot in under a minute and then decided to screw the guy. So we kept bouncing until we moved him into a handicapped spot.
Granted, that's something you can do in a dark lot at night, not something you can do in a crowded mall during the day, but it's something to keep in mind.