[al_borland]

Doing it via a photo implies facial recognition, which can potentially be more creepy for people. Is it happening on device or in the cloud? Do I need to register my face when joining the service? What happens to that data if the service is sold at some point in the future?

[skybrian]

I wouldn't use facial recognition. The idea would be that you take the group photo and share it with everyone using the phone-bumping ritual, and it shows up in your profiles.

But that only works if the social network has enough privacy safeguards that sharing personal photos on it makes sense. Maybe the network just shares the photos encrypted?

And if you can't share photos with your friends on it, it seems kind of limited as social networks go?