What's Your Opinion On The Upvote/Downvote System That Bored Panda Uses?

I know a lot of us have been downvoted unnecessarily, but a lot of us have also downvoted unnecessarily. A lot of the people who get downvoted are being idiotic, sadistic, bigots, but a lot of people just have a different opinion than you. So I ask you, what is your opinion on the downvote/upvote system, and how do you feel when you think you got downvoted for no reason. Give me some examples.