User blog comment:Sannse/On the Internet, Nobody Knows You're a Dog/@comment-452-20130122182930/@comment-452-20130126172852

Facebook still associates it with your account, because they have you IP and cookie when you log in there, and they have your IP and cookie when the image loads here. Unless you block http://connect.facebook.net/en_US/all.js with either an adblocker or a firewall, facebook still sees every wikia page you view, and unless you clear your cookies and use a different internet connection, they associate it with your account (behind the scenes, obviously).

Basically, if you look at a lot of wikis about penguins when you're logged out of facebook, you're still going to see ads about penguins when you log in to facebook - most people won't really notice, because if they're looking at penguins on wikia, they've probably already added "penguins" to their interests on facebook.