Could you generate search queries to poison data analysis by a search engine?
I am not sure how many queries you'd need to perform to drown out your actual search queries, but there is already is an actual browser addon which does this. This addon is called TrackMeNot and is available to install for both Google Chrome and Firefox. More in-depth information on how this addon works can be found on their website and the whitepaper (section 3), but in short it create a dynamic list of queries based on popular search terms.