I can't think of a tech project with a more important privacy/safety balancing act than this one. I hope my friends working on it start public discussions on that.
Wow, gonna be an interesting couple of years.
Currently, only a couple of cryprocurrencies are large enough to be really usable without raising suspicion, and those (like BTC) have no privacy.
The privacy currencies are really thinly used.
No precedent for this, hence my suggestion that FB start public discussions on the tradeoffs early.