Too often do I see a question that is downvoted, without any explanation for why it was downvoted, and I cannot find anything downvote-worthy about the question.
Often times I consider (and sometimes actually do) upvote a question merely to negate that downvote, however I feel like this isn't how upvotes should be used.
What are some good ways (if any) to deal with these unexplained downvotes?