Google’s wifi MAC address map not a big deal
From The Register, news that Google Street View cars log wifi networks and their MAC addresses as they drive along. This is pretty scary, but I don’t think it’s as freaky as everybody thinks it is.
The wifi MAC addresses are typically the MAC address of the wireless router, not the internet modem. On the wider Internet, your packets would contain your IP and your modem MAC address. So Google doesn’t have a direct IP to geolocation map.
But their map requires that a device (such as a phone) submit the MAC address of the access point it’s on in order to get the geolocation up to couple hundred feet accuracy.