I found some humor in that I can get a badge for down voting someone.
I try to look at the positive things in life.
It's a waste of energy looking for the negative.
I'm sure someone will down vote this so they can get that badge. :-)
Why shouldn't there be? There are badges for all other major moderation tasks (flagging, editing, upvoting, deleting, reviewing), why should downvoting be exempt? Whatever you may think of it, downvoting is an important part of Stack Exchange.
Agree 100% with @muru. The only thing I'ld add is that downvoting is arguably even MORE important than upvoting in the answer sorting process. There's also a badge for retracting a negatively received post/answer.
I have, in the past for example, gone through and started deleting all my 0 or negative answers or questions as site cleanup assuming there's another more thorough answer present.