if a driver leaves it at the wrong address then the buyer would know, and be able to prove it, because the photo would not match their physical address.  They wouldn't take a close up of the parcel, they would take a wide enough shot to show some of the area around where the parcel was left.  A buyer who does not receive their item could then seek compensation from Aust Post as Aust Post would see clearly that the item went to the wrong residence.  That way sellers would not be subjected to claims as AP would have stuffed up.

As for drivers taking a photo and then taking the parcel home . . . . they would only be able to do this once as subsequent claims to AP about parcels delivered by that driver would show a pattern.

I can't see any problem with requiring a photo to be taken, and if implemented, then any problems that do arise can be sorted out.