If everyone gets along, and not in that "pleasant on the surface but back-stabbing underneath" kinda way, then a community benefits at multiple levels. Happiness is contagious. We pick up on other people's emotions and then experience, if not broadcast those feelings.
I think we should simply do away with hand shaking altogether and adopt the prayer salutation. I'm all for bringing out our inner Buddha and showing it off, and a good way to do that is by how we greet each other each day.
Have you ever had an experience like that? Where you wanted to connect with someone, but just could not? Blame, guilt, frustration, shame, shyness are other forms of static that get in the way of communicating clearly, and produce misunderstanding.