Tesco's shopper, one of the security measures, participated in the store after being discovered in one of their branches. However, some shoppers claimed that there is a defect in the system that the shopper can easily take advantage of
Source

Tesco's shopper, one of the security measures, participated in the store after being discovered in one of their branches. However, some shoppers claimed that there is a defect in the system that the shopper can easily take advantage of
Source