There is a tradition of keeping discussions on-topic or at least insightful. Off-the-cuff humourous comments are not really suited for a site like this. There are myraid places where that kind of expression is the norm already. This brings the benefit of increasing the quality of the discussion and results in there being less irrelevant text to sift through.

Just ignore comments you don't like or down vote them. By engaging you create more "irrelevant text".

You can't downvote here. This is not SE.

You can if you've got sufficient karma.