I have been thinking about how or if I would track my own children. I do not have any at the moment though.

I think the only system that would work with tracking and still be ethical is a system with accountability.

They need to know that I would never check unless there was an emergency. So we'd have to have some sort of immutable log that they can check regularly. So they know if I checked their location. It should not be like a panopticon. in which they don't know if the parent is checking their location or not. That changes behaviour. Even with the trust that I would not check, just me having the option would alter behaviour probably.

Youth and kids are independent individuals with their own rights to privacy, autonomy, right to select their own friends and acquaintences, right to freedom of expression and movement, right to make mistakes, etc. If they are thought right and have a high trust bond with their parents, preferably with little judgement, then it will probably be fine and most issues can be solved.