Facebook Is Tracking Me Even Though I’m Not on Facebook | American Civil Liberties Union
But while I’ve never “opted in” to Facebook or any of the other big social networks, Facebook still has a detailed profile that can be used to target me. I’ve never consented to having Facebook collect my data, which can be used to draw very detailed inferences about my life, my habits, and my relationships. As we aim to take Facebook to task for its breach of user trust, we need to think about what its capabilities imply for society overall. After all, if you do #deleteFacebook, you’ll find yourself in my shoes: non-consenting, but still subject to Facebook’s globe-spanning surveillance and targeting network.
Facebook’s “shadow profiles” are truly egregious …and if you include social sharing buttons on a website, you’re contributing to the data harvest.
If you administer a website and you include a “Like” button on every page, you’re helping Facebook to build profiles of your visitors, even those who have opted out of the social network.
If you are responsible for running a website, try browsing it with a third-party-blocking extension turned on. Think about how much information you’re requiring your users to send to third parties as a condition for using your site. If you care about being a good steward of your visitors’ data, you can re-design your website to reduce this kind of leakage.