Perhaps I didn't explain myself properly. There are pedestrian walkways within the car park. There are in every supermarket car park near to me. But people choose to walk on the 'road', instead of using the walkways as much as possible. That's their choice, but if I'm over 50% of reversing out of my space I think it's a bit rude and dangerous that when they approach pushing their trolley that they don't at least stop and wait. That's what I would do.
Normally it's a moot point because I much prefer to reverse into spaces, however as I said if I'm doing a big shop I sometimes pull forward into my space to access the boot.