Really? Currently humans are stopping theft. Try to catch a flock of thieves that can roam unstopped in your store and rob it blindly with masks on. Until the police will arrive they are gone and you're left with cameras recording masks of dead presidents eating your profit margins. A few of these incidents and you'll see humans popping back in those stores in no time.

A flock of thieves wouldn't be stopped by a convenience store clerk either. By requiring Amazon Go customers to be registered Amazon customers, Amazon have already significantly reduced the "shoplifting surface". If you're in a city that mandates that customers can use cash, they must interact with an employee in the store (https://www.businessinsider.com/amazon-go-store-how-to-pay-c...).

Since you have to "log in" to the store with your Amazon account when entering, it doesn't matter if you're masked. Whatever you carry out will be billed to your account.

There is no need to catch these people, they're customers, not thieves.

"Mr. policeman my phone got stolen from my hand". Then got used to open the door for the 20 flock that robbed the store blindly. Prove that he's lying.

There are a few reasons this is an unlikely scenario: 1) You need to unlock the phone to access the Amazon Go app QR code 2) There isn't just a door to the store, there are security portals that make it difficult to tailgate 3) If a thief is bold enough to steal a phone, they're not interested in petty convenience store theft, they're going to flip that phone for cash