I'm now considering building a battery powered RasPi device that'll rapidly switch the MAC address on the WiFi adaptor and masquerade as extremely busy periods as I walk through a shopping mall...
> Pry-Fi comes with a War mode, which when enabled tries to make your Android device appear like dozens of people. Just wandering around an area under Wi-Fi location surveillance for a few minutes can ruin the tracking data for the period of your stay.
>rapidly switch the MAC address on the WiFi adaptor //
Seems like you wouldn't need to do that, just do something akin to a DoS where the traffic is spoofed to contain a different MAC? I guess you'd need driver level access to the adaptor though.
Or, maybe you can just send data whilst flipping random bits in the MAC address memory address location?