Perception is everything. That's people's reality. We can rationalize until the cows come home, but that won't change anyone's perception. For that, you must c

Perception is everything. That's people's reality. We can rationalize until the cows come home, but that won't change anyone's perception. For that, you must convince them, individually. The problem is not, I believe, Facebook's inability to explain some service of theirs, it's the fact -- and I mean fact -- that they have repeatedly changed the rules regarding privacy of information in their favour. Because of this, they have lost trust. By associating your business strongly with Facebook -- if it's the only authorization option -- you will be perceived similarly. Thus, anyone who doesn't trust Facebook will most likely not use your service. But that's just my perception.