From the Facebook docs: "A single click on the Like button will 'like' pieces of content on the web and share them on Facebook. You can also display a Share button next to the Like button to let people add a personal message and customize who they share with."
I see no mention of tracking there. And "people should guess" isn't really a viable excuse to me, it should be stated that their button tracks people and might be unsuitable depending of what they want to do. The documentation should also offer other non-invasive methods to do it.
Facebook does not warn website owners that adding Facebook button with the official method tracks users (I wonder why...): https://developers.facebook.com/docs/plugins/like-button
From the Facebook docs: "A single click on the Like button will 'like' pieces of content on the web and share them on Facebook. You can also display a Share button next to the Like button to let people add a personal message and customize who they share with."
I see no mention of tracking there. And "people should guess" isn't really a viable excuse to me, it should be stated that their button tracks people and might be unsuitable depending of what they want to do. The documentation should also offer other non-invasive methods to do it.