So, beyond understanding the skepticism, I actually think it's really important, and personally[0] encourage it. We're not going to get better at privacy if people don't jump our shit over every perceived misstep, because we've either failed to make the right decision, or we've failed to communicate our decision effectively.
All I'd ask is that we try to keep this communication as high signal as possible, and avoid going down roads with no plausible resolution[1]. I think that's best for Facebook, the internet, and discussion in general at HN.
[0] I speak for myself and not my employer, Facebook Inc, blah blah blah.
[1] If you think Zuckerberg is evil and that we're all just going to try to screw you, there's nothing I (or anyone else) can tell you that is going to change your mind.