Vitalik Buterin wrote a blogpost "What do I think about biometric proof of personhood?" [https://vitalik.ca/general/2023/07/24/biometric.html https://vitalik.ca

Vitalik Buterin wrote a blogpost "What do I think about biometric proof of personhood?" [https://vitalik.ca/general/2023/07/24/biometric.html https://vitalik.ca/general/2023/07/24/biometric.html] which seems pretty positive about the project, they apparently have a careful approach to privacy issues.