Nest CEO Tony Fadell:

“The data we collect is all about our products and improving them,” Fadell said, reiterating a statement he issued about the company’s smart thermostat and smart smoke detector following the announcement of the acquisition. “If there were ever any changes whatsoever, we will be sure to be transparent about it, number one, and number two, for you to opt in to it.”

I’m not convinced. Google’s recent changes to Google+ show they are an opt-out company and couldn’t care less about their users.