Could you explain to my technology-and-intrigue-novitiate self the... reasoning behind placing trackers on people? That may have been planted at some time by, I don't know, other people. It's a bit creepy and I'm not sure how I should be feeling about it.

[THERE. This is about as low-stakes a method to get some kind of answer as she could've wanted; better than trying to weasel an answer out over the phone, or worse, at the bar. She even kept it vague (for her standards). That should be worth something.]