Hilariously (darkly), during the pandemic, the very same reason is why the very same administrators were hell-bent on forcing Bluetooth-always-on contact tracing on the whole country's smartphone-carrying population.
(edit: viz. that forcible peer-to-peer bluetooth networking works. One man's unrestricted mass-surveillance is another person's "terrorist activity". Oh how the turntables turn and turn.)
Was that 30 second bluetooth beacon ever switched off again?
But that did save lives; I was able to know my family had Covid before the symptoms showed up. Happened with a lot of other people too.