Telling jokes on HN is risky. HN readers don't want the site full of jokes, so they savagely downvote them unless almost everyone finds them hilarious.
Dissent, because for those of us who have never heard of such a connection (myself included) it is /not/ a euphamism but rather a safe epithet that the use of which never got anyone accused of "foul langauge" nor got anyone threatened with "mouth washed out with soap".