By changing your wireless network's name, or SSID, so that it ends with "_nomap," Google said it will no longer add that network's location to its servers. So, for instance, if you named your Wi-Fi network "Network," changing it to "Network_nomap" would mean that Google would no longer track your router.

http://money.cnn.com/2011/11/15/tech....htm?iid=HP_LN

Seriously?!?!?