Many people use the Internet under the illusion that their actions are private and anonymous.
Many think that the world wide web is an anonymous playground for visiting their favorite sites from the comfort and privacy of their homes. Unfortunately, it isn't so. Every time you visit a site, you leave a calling card that reveals private and personal information. Where you're coming from, what kind of computer you have, and other details of your on-line adventures are available to every site you enter. And most sites keep logs of all your visits.