I am glad I never hit the like button on a Facebook site.
When non-Facebook sites add a “Like” button (a social plugin, in Baser's terminology), visitors to those sites are tracked:
I smell a lawsuit...
If I’m reading this right you don’t have to “like” the site - if they have the “like” button on the page you are tracked when you go there whether you click the button or not.
Hitting the button is apparently not needed. This seems to mean they track you through all the sites you visit, that happen to have a FaceBook button on them.
You don’t have to hit a like button. You just have to visit a site where a like button has been activated. It’s as if your local MacDonalds when you drive by takes your car license, phone data, and does facial scanning of all the car occupants.