Search engine query privacy
An interesting new campaign is underway that seems like a good idea if the major search engines were to adopt the practice.
The search engine query privacy is an initiative to prevent sensitive search data from being stored.
"...if a user includes #privacy in a search query, the search engine should not associate that IP (or other tracking mechanism such as cookies) with the query, nor should that query be made available via public or private keyword tools such as Google Suggest or Overture Keyword Selection tool."
Considering AOL's data release blunder earlier this year, this may make sense.