I think inconsiderate and incompetent is more accurate. Probably the best thing you can do is get a decent dash camera as a bit of insurance. On Sunday i had someone behind me at the lights who's foot 'slipped' onto the accelerator. Causing him to slam into the back of me and push me along for a short while. He eventually figured his range rover was never going to driver over my square Forester and the other pedal was probably a good idea.

At least i have dash camera footage so if he argues with my insurance company about it i have some evidence that i was totally stopped and following the road rules. In your situation most dash cameras will detect the motion of a car as it starts its parking manoeuvre and therefore capture the moment of impact. No arguing with video footage.