Facial recognition technology could become problematic in several instances: 1) When it is used to exclude, because it inherently entails profiling. 2) When it invades spaces that we traditionally consider private, such as bathrooms. 3) When information derived from the technology is centralized and stored without a person's permission. 4) When the technology is used to create an illusion of intimacy which is then leveraged for sales etc. It also seems useful to note not only an official, legal definition of "invasion of privacy" but also the public's general emotive sense of what that means. I think it would be helpful to ask of any new facial recognition technology application, "Could this be in any way mismanaged to cause oppression of an individual or group?" If the answer is, "yes," then that means of mismanagement must be guarded against BEFORE the application is implemented.