I bought some Tiles and Trackrs and gave them to friends who agreed to help me test their usefulness, pretending that they had "stolen" these items from me. I would see if I could locate them a few days later when I "noticed them missing".

I got one ping from a Tile once when the friend had apparently stopped for gas, but none from their house. And zero at all from the Trackr. Apparently there just aren't enough users in my area for the networks to accomplish much?

By stealing battery from every iphone user and data from their cellular plan, Apple has built a find-me network that actually works. Therefore it also works for stalking. Therefore Apple is getting the criticism.