Here’s another example of the ongoing spread of tracking devices.  Cell phone tech applied to grave stones.  Is this first example of tracking applied to what is nominally an immovable object.  The equipment cost for tracking has fallen so low; the costs are now all in the service side of the business; particularly the marketing.

I do hope thunderstorms will be able to trigger howling graves like high-end car alarms in a parking lot.

Contrast that scheme with this tracking scheme where trash bins capture passing device identifiers.  Or this variation $20/year, not shipping yet though.