Well, maybe the opposite is true, and post count does count, and that's why F&G posts shouldn't count, because the posts themselves are not important? While it's true that people aren't their post counts, it does lend some credibility...new members seeing high post counts on other members may not realize that a lot of them were just one-liners and spam in the F&G forum...and on the flipside, might not realize that someone with a low post count is nonetheless a valuable member.
I just think that by disabling post count in the F&G (where it's the most "abused") people might realize that earning respect is not done just through sheer numbers.
That it's not about how often you post, but what you post about that counts.