This video shows the back of the Bunnings car park in Auburn. Sorry about the poor quality, and I failed to shoot the entire stretch - the bit I missed was worse than what I filmed.
An amazing quantity of rubbish has blown up against the fence at the back of the car park, and collected between the fence and a berm. The earth berm blocks the view of this rubbish tip from the car park, so I guess the Bunnings employees have no idea what lurks out the back here.
Bunnings could also argue that this is not their problem - there are other businesses sharing this car park. That much is true, but Bunnings are the dominant (or anchor) store here, and they do like to project a caring, sharing image. They could buff that image by pulling some bin liners and rubbish grabbers off the shelves and sending anyone late for work out the back to do a bit of cleaning up.