Considering this was at 9pm on a Wednesday evening in Cherrybrook Village- with barely anyone else around (the carpark was pretty empty), I'm inclined to think it was intentional.
Take into account what it looks like, and you tell me if those are key marks or not. Could've been a cheap pen knife. Doubt it was a handbag though.
They're both on the driver's door- which happened to be on the side away from the shopping centre. Below is dodgy diagram:
[shops]=[RD] [||||||||||||||||||||]
[shops]=[RD] [||||||||||||||||||||]
[shops]=[RD] [||||||||||||||||X|||]
[shops]=[RD] [||||||||||||||||||||]
[shops]=[RD] [||||||||||||||||||||]
[shops]=[RD] [||||||||||||||||||||]
[shops]=[RD] [||8||||||||||||||||]
Where shops are shops, = is a parking spot facing the shops, RD is the road, and each | is like a parking space... where 8 is the other car, and X is my car. Driver's door is on the right. Someone must've gone pretty far out of their way to reach my car.