Since we cannot hide from privacy practices of our friends, likely their samrtphones are always close by and listening in. You might know what your best friend does on their smartphone, but at a family gathering, distant-relatives will publically share bloody everything: our activities, our food, and of course a selfie (this is the only photo we can perhaps opt-out of).

We cannot know or avoid that our distant-relatives follow a new trend. Like, sending in their dna-test. Perhaps they will do this without our consent or concider the consequences of their actions.