That's what makes no sense at all: the CIA and NSA have been running social network graph systems for years; they know who talks to whom and what the social circles are. The only thing this does is answer who gets within proximity of another... something the NSA and others can probably do already with pervasive video surveillance and biometric identification. This project seems like a massive overreach and I won't be taking part, even if it means pulling the SIM from my iPhone and using a flip phone until sanity returns (or for the rest of my life).