I think you need a FAQ.

In the FAQ you could explain how its not going to be a useful tool for stalkers because that's where my mind goes, maybe I watch too many DateLines.

Though novel, this is pretty unethical.

How much have you investigated the legality of this? In the EU biometric data is 'special category data' under the GDPR [0] and can only be processed in very limited circumstances unless you have the consent of the data subject [1]

[0] https://www.dataprotection.ie/en/organisations/know-your-obl...

[1] https://gdpr-info.eu/art-9-gdpr/

Using biometric data without permission may be illegal. Facebook was sued in Illinois over this.

> The Problem: Researching individuals - whether for hiring or personalizing outreach

So you're helping people profile others based on how they look? Aren't we trying to move away from that?