I don't get how this shows that "scams are hard to detect." This scam was trivial to detect. When the seller's supposed proof of delivery shows a different address, then it's not actually proof of delivery. All it would have taken to detect this was looking at the tracking info and looking at the order's shipping address and observing that they weren't the same.
Yes, obviously something is terribly wrong at Amazon which meant that this simple comparison never happened, but I don't see why we should expect this, or why we should be sympathetic to Amazon about it.
No, it's trivial to understand. It's simply an objective truth that it's hard to detect, given that you and I are hearing about it for the first time in August of the year 2017, when it exploits a USPS tracking data that probably hasn't changed much in 15 years or more. If it's so trivial why didn't you figure it out before? Why haven't Amazon and the post office closed the hole? Why haven't more people been scammed?
Yes, obviously something is terribly wrong at Amazon which meant that this simple comparison never happened, but I don't see why we should expect this, or why we should be sympathetic to Amazon about it.