This just seems invasive and wrong to me - I expect ads on the internet, when watching television, listening to the radio, etc, and I signed up for those things with the full expectation that it would be part of the package.  We should be able to get away from the constant barrage of advertising though in some aspects of our lives; the car dashboard could be downright dangerous.
http://appleinsider.com/articles/14/05/21/google-admits-it-may-place-ads-on-thermostats-glasses-car-dashboards-refrigerators

Here's an article that talks about alternatives to Google services, so you can get away from all the personal tracking.

http://www.gabrielweinberg.com/blog/2014/09/what-i-use-instead-of-google-services.html