There might be a way to achive this: Build a Muli Airtag: When there is a device which instead of spread out one signature it spreads out a list of signatures, it would prevent phones from detecting that you are tracked but one would still be able to track people.
So basically by building a ultimate tracking device for cheap, they might be getting forced to change their system or disable it.
Since this is imho a possible theory to create the ultimate cheap tracking device, it might be already built