We cannot live in the world without drawing criticism about something we say and do from someone. Take the Bible, for example. One could say that during the course of its writing, rewriting, editing, cutting out and adding-in, thousands of people presumed to edit, "correct," and tailor the "Word of God."
And further, we can say that by doing this they "voted down" some of "HIs" words that they (the political and religious powers-that-were) didn't like, for whatever reason. So, if can happen to The Great Sky Father, then it can happen to us piddling human beings.
But seriously though, reasonable people can disagree, strongly. We all know that. What is good to me may not be good to you -- no matter how good I think it is. Voting down something I write shouldn't lead me to conclude (in a state of arrogance) that there "is something wrong with you," because you rejected something I like or produced. As some people said, use of the option to vote down is part of HP interaction, isn't it?
I never use the 'vote down' feature myself, personally. If I don't like something I just don't leave a comment. Personally, I guess I just follow the "If you can't say something nice..." rule. But other people have other ideas, don't they?
Take it easy.