I can't help thinking this is the future. Like it or not, taking real peoples 'likes' and 'dislikes' into the search algorithm will significantly reduce the SEO spam overload problem that is plaguing google. Its been said many times on HN that google is becoming less and less relevant. Its the problem of getting a machine to make recommendations without any human intelligence.

The future of search will take into account input from the masses, and, at the moment, facebook are the people with the best access to this information. Be afraid google.