Also isn't it about as useful as the do not track header? What about other vendors mapping it and data sense etc?
I moan on behalf of others as my network is ethernet due to things like this.
There are enough AP's around me for Apple Maps to know if I'm in bed or having a poo. You can see the marker move.
More services like this are bad.
They already know who I am.
What could possibly go wrong?
Edit: when I say more services are bad like this I mean we should be opt-in for both collection and usage rather than opt out.
Mapping the source of radio signals is common and expected. Your Wifi router is basically a big bright lightbulb that flashes with a unique pattern, and can be seen through walls. You can't legitimately ask the rest of the world not to notice it, the same way you can't request that no one use your porch light as a landmark.
Nowadays it shouldn't, no, but Google's had some lawsuits where their Streetview cars accidentally scooped up random bits of data crossing over the wifi lines. This measure was added afterwards, iirc.
"Google long maintained that the engineer was solely responsible for this aspect of the project, which resulted in official investigations, some still unresolved, in more than a dozen countries. But a complete version of the F.C.C.’s report, released by Google on Saturday, has cast doubt on that explanation, saying that the engineer informed at least one superior and that seven engineers who worked on the code were all in a position to know what was going on." - http://www.nytimes.com/2012/05/01/technology/engineer-in-goo...
http://www.wired.co.uk/news/archive/2012-05/03/googles-wi-fi...
That doesn't sound like very much data for a fleet of vehicles to collect over the course of a few years. Pretty sure it was just a handful of packets per (unencrypted) access point, but please correct me if I'm wrong.