[fistynuts]

You're absolutely right. I'm surprised this isn't more well known.

Here's an article from 10 years ago talking about tracking people in airports. https://www.futuretravelexperience.com/2011/04/bluetooth-pro...

[hnaccount_rng]

But this isn’t that. That kind of “collect BT MACs” is old news yes. This tracks BT _antennas_ independent of the data that is send out. This basically makes any kind of annonymisation impossible (given sufficiently sensitive equipment sufficiently widely distributed etc).

I wouldn’t think that it is a massive problem as most of the “I want to know how fast people move” level of information is simply independent of being able to actually identify the specific person. But maybe I’m underestimating the willingness to grab data or overestimating how sensitive the equipment needs to be to be reliable