I guess it would be interesting from a personal point of view to see where I was posting the most but other than that I don’t see much purpose. Personally the only thing I use post count for is to quickly check to see if an inflammatory post is likely a new troll. To be sure I usually check there actual posts to see what they’ve had to say. Other than that I place no value in post counts, green/red Chiclets or other various attempts to assign value to peoples comments. I think the only way to do that is to read enough posts to get a feel for who people are.
