I understand what you guys want to say, but must say I completely disagree with this approach. This reminds me on New Agers that put colorful glasses and pretend that everything is great on this planet. Trying to be positive is not right way in my opinion because it trying on force to be positive. What we should do is to create world where negative thing woudn't happen and then we will not have need to try to be postivite. That would be our natural state and we woudn't call it positive any more. In this world today, staying positive means ignoring negative, just you said in your post. That woudn't change anything.