Not exactly true. Most people would infrequently use the buttons, but when they do, you can be sure they want it that way. I would suggest that the big reason

Not exactly true. Most people would infrequently use the buttons, but when they do, you can be sure they want it that way. I would suggest that the big reason not to go down the avenue of social buttons is the inevitable gamification of it. Already we have have ratings farms for apps and amazon. Of course we will have similar if search implemented this.