Brains working towards machine consciousness

I am intrigued. In general, I use a Google search to provide me with links to things I don't know, so the most obvious use for the promote/demote concept in search results is to stick the stuff I have come across before lower in the list of results, so that I can see the newer stuff more easily. Only, I suspect that if Google are 'leveraging' the information available to them from my actions, this will give them precisely the wrong impression. I imagine they would think people would promote results they found useful, and demote the irrelevant.