Whose cars are in your driveway on Google Maps? Yours? The plumber's?
Who's tagging you in photos that you might or might not want to be public?
Whodunnits with plot twists that turn on social media are only going to increase, until they stop, and they will only stop when permission and privacy matter.
One sign that could happen sooner rather than later: the current generation of digital natives has learned from the online embarrassments of those who came before them, surveys say.
Progress marches on.