Really - I'm off the grid but now Google put me back on?
"If you happened to be a dissident in a country with no democracy and a poor record on human rights and justice, you might be quite disconcerted that databases of Google, Skyhook, etc. could be used to determine your location"
So I've got a house, broadband connection, bank, phone, pay bills, have a car etc. etc. but the only way the government can find me is because I foolishly wrote to them to let them know my MAC address and they asked Google where it was?
If I was in that situation I certainly wouldn't have a WiFi router broadcasting my location (assuming someone has my MAC address).
Someone said that there was/might have been a website that might have done something. Sure - maybe 1 in a million this would happen but given all the other ways to locate someone - it's a "horse bolted" situation.
Unless you're living in a cash only world anonymously in some squat without a mobile phone but, for some reason, with a WiFi router that you've registered with the government - I'm not sure what the issue is!