Earlier quoted context omitted.
yeah, the last thing I need is my Nest thermostat and my Nest smoke alarm sending data about my house to Google / NSA
I don't really see what they have access to privacy-wise that is any more intrusive than a smart-phone with a microphone and a GPS chip. And if the NSA can target a huge company like Google, I bet Nest was child's play to infiltrate.
It's another thing to feel insecure knowing that people know when your home is unoccupied. Just wait until the next big data breach happens.
It's especially interesting b/c not only is this a "when are they not home" detector, but the "they" is an indicator for "wealthy enough to afford nice things."