Amazon Go

What happens if somebody compromises Amazon accounts by the hundreds and hires a shoplifting crew to clean out that store everyday, selling the goods for 1/2 price on the black market.

Retail organized theft is already a major problem here and this is with stores that have F/T security. There is no shortage of drug addicts willing to jack items for $0.10 per $1 retail value, the goods are then exported and sold in China for things like toothpaste, babyfood, ect.

This is a strategy you could only accomplish a single time. The losses would be on the order of $10,000 for food only currently on display. you probably wouldnt be able to sell your stock before it expired. and the whole thing would be recorded on camera.

not to mention you'd be arrested for hacking

I assume they will sell non perishable items at some point when this becomes public. I bet there will be security at the doors verifying purchases after the first couple of weeks:

http://www.inews880.com/syn/112/172511/mom-and-pop-bust-reco...

https://www.thestar.com/news/canada/2016/11/17/bc-man-arrest...

There's a couple things to prevent this, some really simple and effective. If you've visited the store before they'll have a lot of pictures of your face to compare anyone checking in with your account with. An additional security check when a new phone is added to Amazon Go. Also when an amazon account is used with Go it'll also include a lot of information about the phone it's being used with so our hypothetical group would have to be able to get a large number of anonymous phones or any half decent fraud detection setup would recognize those phones since most other phones will be associated with a single account ever.