This is not exactly biology, but nonetheless - over on Pharyngula, PZ Myers has written an eloquent and moving post on why applying shades of grey to 'black-&-white' issues may be doing us all a disservice:
But sometimes the issues are black and white. Sometimes the answers are clear and absolute. And in those cases, attempts to bring out the watercolors and soften the story by blurring the edges do a disservice to reality. There are places where there are no ambiguities, and the only appropriate response is flat condemnation. And we witness them every day.
I urge you to read the rest of this thought-provoking piece.