If I was evil and stuck these to ex-girlfriend/boyfriend car or something, illegal? Edit: Downvoters. I am not doing this obviously. Am asking as this is the clear abuse I see. Tracking people without permission. I see this as being a weird legal thing we hear about down the road.
I also originally wondered about that, but they use Bluetooth for tracking. Doesn't mention what version, but even with Bluetooth 5.0 the maximum range would be around 400 m/1.000 ft under ideal circumstances. So the tracking would only work if you actively pursued the target to stay in range. Probably much more practical to go for an actual GPS-tracker, magnetic versions of those can be bought on Amazon for like 50…
If you lose a tracked device, you can see its location if a random person’s Internet-enabled iDevice hears any of its chirps. The stranger’s device doing the relaying is unable to decrypt the contents; it just forwards the data to Apple.