Providing people use it in a responsible and mature way, then it could be a good thing. Ebay had a similar problem in the way that people wouldn't leave negative feedback, for fear of getting negative back from a disgruntled seller, tainting the buyers reputation. I will hold my hands up and say I'm one for doing exactly the same, I've never left negative feedback, as I don't want to receive negative in return. What they have now done, is sellers cannot leave negative feedback, only the buyers. Maybe a similar system could be implemented here?