My worry is more that there will be an exploit for Android that will collect all those Bluetooth IDs and geolocations and upload them somewhere that somebody co

My worry is more that there will be an exploit for Android that will collect all those Bluetooth IDs and geolocations and upload them somewhere that somebody could use nefariously. Not saying that telcos have shown any moral high ground with location data, even Google has this level of location tracking enabled for a considerable amount of people. I'm most worried about an Elasticsearch instance cropping up where somebody's bluetooth ID can be used to see how they get to work, etc. Faraday cage bag for phone seems like a reasonable solution.