Your grocery store loyalty card does more than just save you money on your weekly shopping trip; it creates a detailed record of every single item you buy. Most of us assume that this data is only used by the grocery store for its own marketing purposes. However, a shadowy network of third-party data brokers is now buying this information, creating sophisticated consumer profiles, and then selling those profiles to other industries, including insurance companies. This raises serious privacy concerns about how our most mundane daily habits could be used to judge us.
