User blog comment:DaNASCAT/Technical Update: January 20, 2016/@comment-24055022-20160121000903/@comment--20160121024737

I would have to agree with Miststream on that too. I certainly understand how beneficial the opposite of a kudo could be... But I sort of like the expression "if you don't have anything nice to say, don't say anything at all". For me, I would be hurt if I was giving out a reply or help and someone did a "dislike". It wouldn't make me motivated to continue giving out responses due to that.

Sort of similar with Facebook. Having people dislike your photos and such would be hurtful.