FWIW, Clif High says the Mac Address thing is BS. apparently they put Bluetooth devices in modern coffins to reduce misidentification, which has lead people to believe those people were all vaxxed.

I'm curious, why is the broadcast name "vaccinated" for a bunch of those Bluetooth addresses? Surely they wouldn't be that dumb to broadcast that name? Seems way too on the nose.

EDIT: I just read some of OP's other comments. Apparently the app replaces "unknown" signals with the label "vaccinated". I'm no expert on wireless signals, but it seems like that could be potentially misleading.