well, it's one thing to feel insecure knowing that people know where you are (cellphone/mic/GPS). But if you're attacked/ambushed/blackmailed/kidnapped, you can always fight for yourself, scream to attract attention, etc.
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."