There should be an "upvote if intended irony" button on HN, where the author has to flag the post as irony beforehand and gets the upvote only if he did it, oth

There should be an "upvote if intended irony" button on HN, where the author has to flag the post as irony beforehand and gets the upvote only if he did it, otherwise it becomes a downvote and vice versa.