What you want to know about social networking sites & your privacy

The Electronic Frontier Foundation posted Part 2 that shows how social networking sites help create data bases of your online activity.

This example is about job searches:

Let's start with an example of 3rd party tracking: when we went to CareerBuilder.com, which is the largest online jobs site in the United States, and searched for a job, CareerBuilder included JavaScript code from 10 (!) different tracking domains: Rubicon Project, AdSonar, Advertising.com, Tacoda.net (all three are divisions of AOL advertising), Quantcast, Pulse 360, Undertone, AdBureau (part of Microsoft Advertising), Traffic Marketplace, and DoubleClick (which is owned by Google). On other visits we've also seen CareerBuilder include tracking scripts and non-JavaScript web bugs from several other domains. There are pretty sound reasons to hope that when you search for a job online, that fact isn't broadcast to dozens of companies you've never heard of — but that's precisely what's happening here.

Be sure to check out Part 1 about Cookies and how hard they are to remove and how advance they've become.