You did know those cars and trikes Google uses to take photos for Google Street View were also collecting your Wi-Fi Access Point (AP) information and location too right? Well, they have been since 2009, and now, thanks to complaints from privacy advocates in Europe, you'll be able to opt out of this "service."

In a Google blog site, Peter Fleischer, Global Privacy Counsel, wrote, "Even though the wireless access point signals we use in our location services don't identify people, we think we can go further in protecting people's privacy. At the request of several European data protection authorities, we are building an opt-out service that will allow an access point owner to opt out from Google's location services. Once opted out, our services will not use that access point to determine users' locations."

Of course, as Paul Ducklin, the Head of Technology, Asia Pacific, for a Sophos, a security firm, notes, "This is a Catch-22. Google pretty much has to keep you on file, simply in order to know that you didn't want to be on file in the first place. Otherwise they'd just add you back in next time the Street View Wi-Fi scanner came round - and then you'd have to opt out again. Sadly, you can't opt out of the Street View collection process proactively."

Google says it collects this information so that its location services will work better. "Google Maps for Mobile, for example, helps people find themselves on a map and then locate places nearby," Of course, you probably already know where you're at. I'm in my office. No surprises here!

Seriously, this information is useful for any location-based service. Yes, you can use GPS, but Wi-Fi amd cellular phone tower-based geographical information helps nail your location when you ask for say directions to the nearest coffee shop.

Google Street View vehicles collect your Wi-Fi AP's unique MAC (Media Access Control) address, network name and location as it drives by. Since most access points stay in the same place, Google can use this data for its location-based applications.

That's good for location-applications, but although Google doesn't correlate your location with your AP and physical address, let's face it; it wouldn't require a lot of work to narrow down where you're likely to be found when you combine your AP data, the corresponding Street View photographs, and your ISP information.

So, if you're on America's Most Wanted-or you think you have a very tech-savvy stalker chasing you-you really don't want your AP's data to be collected by Google.

You can't stop it yet though. According to Fleischer, "We'll be making this opt-out available globally, and we'll release more detailed information about it when it's ready to launch later this autumn."

Related Stories:

Google Street View cars nabbed locations of Wi-Fi devices

Israel opens up to Google Street View

Police Complaints Stall Google Street View in India

Google Street View Trikes: Because your front door wasn't good enough

Google's Street View: Benefits outweigh some privacy concerns