There is a clear value from negative opinions. I can, per example, intervene on a To The Moon thread by giving my opinion about why the game fails spectacularly story-wise. That adds a new point of view to the debate, being not just people clamouring the game. I can intervene on a thread about a game that was dissapointed and failed to get my attention. I may even get a new perspective that makes me change my opinion to the game. Discussion enriches the experience.










