On another more on-topic note, what an awesome time to be alive! :) When I was younger concepts like this were usually paired with flying cars and space travel in cartoons, but now it's real.
As for plain old physical theft:
Oh here is an interesting exploit. Buy or steal a $20 "VISA gift card" register an account with that as the payment option, walk into the store, grab $500 worth of steaks/liquor, walk out.
I worked at a food store as a starving student and we had interesting problems with people loading up carts and shoving them out the fire safety doors into a waiting pickup truck and driving off. If you allow people with false ID into the building, you will get ripped off. I can assure you police are completely uninterested in video footage of shoplifters, probably due to the near infinite volume. If you can physically get away, unless you achieve felony levels of theft value, you're simply free. This might have interesting long term implications for whats for sale as fewer and fewer people have higher and higher paying jobs and everyone else is perma-poor, such as this tech might scale for 80 pound bags of rice and flour even when almost everyone is poor, but not jars of caviar and $300 bottles of liquor and rare wines and jewelry stores. Salt and pepper, sure, saffron threads probably not.