What is the controversy about the use of facial recognition software and ethical dilemmas? If you are an employee can you refuse?

What is the controversy about the use of facial recognition software and ethical dilemmas? If you are an employee can you refuse? What are the implications of this from a code of conduct perspective. Can technology (with all its sophistication) prevent misuse? Are there some in built controls (e.g. parental controls in TV watching) that can prevent improper use of technology?