One way to do that would be to block cookies of those Internet advertising networks. It also works to clear cookies after every session but there is a better way. Many Internet advertising networks are providing ways to opt-out of behavioral targeting by setting so called opt-out cookies on the user’s computer system.

If an opt-out cookie is present they will not track and analyze the user by placing additional cookies on his computer system. The major problem here is that there are hundreds of online advertising companies that use behavioral targeting in some of their advertising campaigns.

A user following that manual approach would have to locate the website of the Internet advertising network and there the page where the opt-out cookie could be set. This would take days and the chance would be high that a lot of networks would be missed.

Privacy Choice was mentioned in yesterday’s post about Google’s new behavioral ads. The website provides the means to opt-out of behavioral targeting of dozens of ad networks including major ones like Google AdSense, DoubleClick, Yahoo! and AOL.

A click on the opt-out button on the main page of Privacy Choice will set all opt-out cookies that are currently provided by the service. This may take up to a minute as several connections to the various internet advertising agencies are established to set the cookie.

The only thing that you need to be aware of is that the opt-out cookie is a normal web browser cookie that will get deleted if you clear all of your cookies. You would need to set the opt-out cookie again after clearing the cookies of the web browser.

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