> The genie is somewhat out of the bottle already Very much so. As early as 2012, maybe 2013, retailers were piloting technology that would offer guest wifi ne

> The genie is somewhat out of the bottle already Very much so. As early as 2012, maybe 2013, retailers were piloting technology that would offer guest wifi networks, then track you using the in-store surveillance cameras. Don't even need facial recognition, just tie the person's identity to the phone they logged in with. The camera adds better location data than you could get with the wifi alone. This was about the time that Amazon was offering a Black Friday discount if you used their app to scan the barcode of a product in a retail store, then bought online — and back then, only checkout was https, so if you were in the data path you could detect that sort of a lookup.