Every time you use a loyalty card you surrender personal information.
Very few people really like the "loyalty card" program, and it's expensive for us to run.
Regardless of the outcome of Crowson's suit, it underscores the need for retailers and policymakers to examine what sort of responsibilities come with private data gathering under loyalty card schemes.
As it happens, Tesco routinely collects such information from holders of its Clubcard loyalty card.
A store or loyalty card can be fitted with an RFID tag to identify customers on arrival.
