If you open a cookie with a text editor like notepad, you will find a web address in there that the cookie reports back to. This can be changed to a nonexistant site like
www.me.com. , the cookie then cannot send any info home. Some sites look for their own cookie, and if its there they are happy and think reports will be forth coming, if not there a new cookie is sent.
The moral is edit the cookies to send nothing, but it can take a long time and will be on going, or use add aware and remove them on startup.