I'm terrified of letting my kids roam, when they get old enough, like i did myself. But also, I want them to do it, and also without tracking them.
I suspect I will be even more anxious about letting them roam with a tracking device than without. I would probably check it too often, and freak out if the signal was lost or something like that.
I asked my parents recently if they were ever freaked out and nervous when I was out, and they weren't. I can't imagine it.