Use of facial recognition technology without consent at an Indian Café raises concerns

Chaayos, a popular multi-city chain of café in India, is in the news after it is using facial recognition software to bill customers. Indians have expressed concern about it and it has created a stir on social media. 
Instead of passwords, the facial recognition technology that chaayos uses allows devices to identify users by their faces. 
Though Chaayos claims that the system has been put in place to eliminate t....