I know, and the folks making the videos do, too.

The main point is, before this does ANY tracking, you’ve got to get an object that’s approximately 1.25 inches wide and over a quarter of an inch thick attached to someone OR in their possession in a way that they won’t find it.
If these people weren’t willingly being tracked, I doubt they’d ever get to the point where they find out what happens 3 days later. Plop down your backpack to pull out your headphones, “What the hell is this?” Google it, use your phone to reset it, now you’ve got a free toy OR just smash it.