There is still a problem with it. Currently, punks will take security tags from packages, and place them in or under carts. When a customer walks out through the security sensors, alarms go off and it embarrasses the customer. Punks get their laughs.
Only now, with this new system, the customer gets falsely charged for the punked tags with no merchandise. Customer has sad face when they review the charges later on at home.
Eh - sounds like a relatively simple issue to address.
When you use a regular checkout at a store today you have to check your receipt to avoid being ripped off. Items ring up at the wrong price or as the wrong item all the time. If you don’t verify your receipt you are at throwing money away. So you would still have to do the same thing with this system.