OP here. My kids know "Mommy doesn't like Google." If we were totally restrictive and opaque about it, it might feel like living in a cult. But I use data privacy techniques to teach our kids about how systems work, where data flows, how computers process information, and how to implement home-grown alternatives. Otherwise they'll think an Alexa "just works" when they talk to it, or that they're a "digital native" just because they can swipe on a gesture-based interface. They will grow up and make their own choices: my hope is to prepare them with a better understanding of how systems work under the hood, a richer grasp of the history of surveillance in society--and a relatively clean slate data trail.