Facebook tracks everyone's browsing through "Like" buttons. A scandal has erupted because Facebook says it will [ use that data to choose what ads to show people. ]( http://www.washingtonpost.com/blogs/the-switch/wp/2014/06/12/privacy-experts-say-facebook-changes-open-up-unprecedented-data-collection/ ) How Facebook uses that data is a distracting side issue. The real injustice is that Facebook (and other companies) collect this data at all. That practice should be prohibited by law. You can protect yourself from this particular surveillance mechanism by using a browser such as [ IceCat ]( http://gnu.org/software/icecat ) that blocks the things that do the surveillance.
Ссылка: https://stallman.org/archives/2014-may-aug.html#11_August_2014_%28Facebook_tracks_everyone%27s_browsing_through_Like_buttons%29