Here is my take on karma. Karma gives users an incentive to post content based more around grabbing attention than quality.
I think it is for the best that karma doesn't exist here as it allows users to post what they feel without an alterior motive such as gaining internet points.
I kinda wish they would also hide the upvote/downvote numbers as well. Completely remove all the visible numbers that could potentially be used to "keep score". Posts and comments shouldn't be about who's winning.