Google Wants to Serve Ads Based On Your Phone's Background Noise

Continuous heuristic analysis of phone calls means the entire call, not just the background noise, will be run through remote computers. Given the desire of various agencies to scour all communications in real time for key words and elements, how can this be good for anyone? http://thenextweb.com/google/2012/03/21/google-wants-to-serve-you-ads-based-on-the-background-noise-of-your-phone-calls/