I was on a remote beach last year and there was no one within 200 yards or so around me. Then a couple came down to my end of the beach in nothing but their bathing suits (him swim trunks, her 2 piece). They had no phone, smartwatch, headset/buds, no electronics on them. I did a scan on my phone and there it was 2 Mac addresses. So its pretty apparent from my view. Especially when groups like la quinta columna break down all the tech that's in the shots. It all makes sense. These people are marked.