To those new, it pays to master the subtle-but-not-so-subtle chestbeat. It is a delicate balance because you want to avoid being accused of such, but at the same time you can leave no doubt that you are the muthafukin man.
So for example when someone posts a TR about some difficult line, your response should be, "Great line, isn't it?" or something to that extent. This makes it clear that you have climbed said line before the person, yet you have ammunition in case someone accuses you of an attempted stealth cheastbeat. This can backfire if the line isn't that great. The possibilities are really endless.