My understanding is that downvoting is only for trolling or spam-like comments. Disagreement is good, disagreement can be healthy. A well-spoken (or even not-

My understanding is that downvoting is only for trolling or spam-like comments. Disagreement is good, disagreement can be healthy. A well-spoken (or even not-poorly-spoken) argument that is contrary to popular opinion should be upvoted. If we don't allow, or punish, unpopular ideas we'll become a homogeneous mass with no new ideas.