Re: Pickpockets paradise
> This is a problem under US and UK law: shops are required to accept cash.
In the US this is not generally true, although there are a couple of places that have passed such laws, and I expect that trend will continue.
> The lack of a cash option is a deal breaker for me.
Me too. Additionally, any requirement that I provide identity information (credit card, randomized identifier, etc.) is a deal breaker.
> I have not seen any warnings about the existing system of tracking how your phone moves around the shop using the free WIFI.
Yes, this is an increasingly common thing for shops to do, regardless of how they manage payments. And most people still don't have any inkling that this is happening. That this happens is why I put my phone into airplane mode when I enter any shops.