incrediBILL - 12:20 am on Oct 12, 2010 (gmt 0)

There is a vast difference between transmitting the page that the user arrived from (the original intention) and transmitting a list of keywords that the user entered.

Not when the URL is SEO friendly like my example as it divulges lots of clues about what the user was doing without any search keywords. By collecting a bunch of URLs you can easily build a profile about the user. Therefore any transmission of the referrer, with or without keywords, is a violation of privacy if you really want privacy, that's all there is to it.