Fair point indeed
My best answer is that when in Princeton, she didn't have many options. She could either run from the house, as she had, or drive elsewhere. But if we mean elsewhere in Princeton, (let's say someone in Princeton spooked her), she could still encounter that person. Even worse, farther from home/safety.
If someone spooked her on that 9-6-15 run. Here's a situation that I see that could have happened. She mentioned something to someone afterwards, about a weird guy, "maybe it was nothing, maybe I'm being paranoid". perhaps to family or friends. Mom asks about the tracking of runs and asks if it's really a good idea to tell everyone where you are (since her generation thinks this kind of thing is just blatantly stupid) suggests she turn off the tracking.
In general, I just see SOMETHING happening to trigger a conversation about turning off the tracking, or something happening triggering her to consider that public tracking might not be good. What was it? And why was t seemingly just after a run in rural Princeton on BSR? Peaks my interest.