From “The Irrationality Game” (emphasis as in the original):

You have to actually think your degree of belief is rational. You should already have taken the fact that most people would disagree with you into account and updated on that information. That means that any proposition you make is a proposition that you think you are personally more rational about than the Less Wrong average. This could be good or bad. Lots of upvotes means lots of people disagree with you. That's generally bad. Lots of downvotes means you're probably right. That's good, but this is a game where perceived irrationality wins you karma. The game is only fun if you're trying to be completely honest in your stated beliefs. Don't post something crazy and expect to get karma. Don't exaggerate your beliefs. Play fair.