Earlier quoted context omitted.
I'm not sure I mind FB collecting data on my when using FB directly. OTOH today I read a 10 minute article on an unrelated site about loneliness. When I got to the end of the article an in page popup appeared that said something along the lines of "Liked by 9571 people including your friend John Smith". I was extremely creeped out. What right does FB have for knowing that I read some article on an unrelated website?…
Clicking "like" on an article is a action that you take only if you want that like to be seen by your friends. It is an inherently public action, don't see anything wrong here.
And that is creepy, I think, and one reason I have all the good adblockers and tracking blockers and cookie cleaners that GP mentions installed, too.