On _nomap and _optout

[bobzilla]

For a false sense of security Google and Microsoft allow you to opt out of including your network in their geolocation systems. WiGLE automatically hides networks (currently 16,644) with these _nomap and/or _optout tags in the ssid. Note that unless you turn of your beacon your network is still blasting the presence of your network to anyone within radio distance. And even with beacons off your network can be noticed just via traffic flowing on it. As always, obscurity isn't security, encrypt all the things.

https://support.google.com/nexus/answer/1725632
http://www.windowsphone.com/en-us/how-t ... i-fi-sense