To your second statement/question:
People cannot use item ownership to track locations. It was and is most certainly a golden rule infraction, but it's no longer possible (hasn't been for a while). If you've found a way to do it, you should immediately report the method as a 'Private exploit' bug.
Ethan: You can only Unclaim items at your location. It'd be nice (and many have asked in one way or another) for the Inventory to present an option to unclaim-at-a-distance so Owners can just unclaim items they don't ever expect to get possession of again. Better than sending to Darth Doughnuts.