Ran across this article on CNN that pushed me to this website. If you are worried about the data collected about you while you are surfing the web. This page gives you the option of turning off the tracking of many of the major profilers. Now I don't know how effective this is and it is done by the use of cookies. I completed the form and had to go to about half the advertisers sites to complete the "OPT OUT" process on their individual sites. If you are concerned about privacy this is one step you can take to protect it. Oh, and you will ave to do this on every machine you use to surf the net.