Yeh like Lighty said, you get a higher rank by posting more. But don't post just get a higher rank. really they are irrelevant. Just a little bit of fun on the side. Remeber- I think thhe saying is "Quality, not Quantity"
When you post, make it meaningful to the topic, and make it five words or more. If your debating, make sure you have a point to your argument, and do research to back yourself.