It isn't just the cloud or retailers security- security is badly done on most communication devices- going to be a big problem with the Internet of things. That's why I'm not planning on getting a fridge that will auto order milk and OJ from my supermarket
smart meters open to hack attack
http://www.bbc.co.uk/news/technology-29643276
My water meter and electric meter are both "smart"; I think this illustrates "a little knowledge is a dangerous thing"