Cookies have been a feature of the web for as long as I can remember. In many cases they are a useful feature to have as they remember your preferences and limit the amount of times you need to login to a service you have signed up for. But there is a dark side to cookie use in the form of themtracking where you go.
The advice to anyone concerned about tracking through cookies is to use a good cookie clean-up utility and log out of sites you believe to be tracking you around the web. But in the case ofFacebook it turns out that logging out of your account is not enough–Facebook continues to track you.
This is possible because when you log out of Facebook the associated cookies are not deleted off your machine. So, any site you visit that has a connection to Facebook e.g. the Like button that is now so common, will proceed to check if you have a Facebook cookie. If you do, it can pick up the information and know you’ve visited that site. Continue reading