I used to think that most of them were "inside" jokes but I've come to realize that they are jokes between frequent posters which can be understood if we were to spend all day on the wall and could read all the threads. I've been part of some when I've been able to read and post for most of the day, but if I miss some - no big deal. I still have trouble figuring out the comments between BIB and some of his cronies.
But rest assured, if you're a waller who shows up at lot 1, pole 5 on game day, you'll be welcomed.