I'll be honest, the way a lot of you are describing how this will work sounds like a stalker's dream to me. See some girl get out of her car at Target, put a hidden tracker in her tire well, and follow her everywhere. I can't see any way that Apple of all companies will allow that to happen. How they will prevent this I don't know. They could notify you if a tracker other than your own is nearby, but that would very annoying.
I'm interested to see how this will work.
You reminded me of seeing that exact scenario in so many films, where they put a tracker under the car, then you see the red dot moving along the map on their screen.
As you say, an excellent way of finding our where someone is going or where they live.
Even slip on in a ladies handbag of coat pocket.
As you suggested, the app could show ALL Apple trackers in a certain radius around you, so you would know if you had someone else's tracker near you and it stayed near you as you moved.
The MUST have considered this scenario, so I'd hope you are right there.
Also, this will very much depend on range.
I don't know the typical range of other trackers, but say 50ft would be very different than 500ft when it would come to following someone. The less the range the safer YOU would be from others, but of course the less use it is as a tracker for the owner if it's only got a short range.
Certainly a safety/security issue that will be interesting to see how Apple have handled this.
I'm sure the last thing that want is "Woman raped after man followed her home thanks to his Apple tracker he placed on her"
Interesting how this is made safe.