I wonder what would happen to their collection system if there were many people carrying “chaff boxes” that continually pinged with random MAC addresses? (A Pi ZeroW with a battery could do the job.)
Alternately, rather than random MACs, listen for phones checking for APs and add those MACs to a list, then use that list to spoof AP checks. As soon as the phone and chaff box parted ways, the tube tracking system would see the phone in multiple locations, rendering their data fuzzy.
I mean, if people actively connect to the tube wifi, then game over, but people just traveling with wifi on shouldn’t be tracked.
