That isn't how the "Like" social plugin works. The site doesn't know anything about you. FB, on the other hand, does know you visited that porn site though I ex

That isn't how the "Like" social plugin works. The site doesn't know anything about you. FB, on the other hand, does know you visited that porn site though I expect that amount of data is too much for them to store for long. They will of course definitely store something if you like it.