This is true. But in your point I assume you are talking about the company who is doing the facial recognition I assume. But that is not the case really. Even i

This is true. But in your point I assume you are talking about the company who is doing the facial recognition I assume. But that is not the case really. Even if the person uses a home grown tech, the person can eventually share it to another dataset. A good example is me refusing to share my photo with my friends for that app which turns you into an old guy. Another friend just out of spite shared a personal photo he has of me. Now my photo is in this Russian database which does data mining. For better privacy, you being careful is not enough. You need to make sure everyone around you are privacy oriented. And we need to make systems that make that happen. Opt in privacy is not effective.