If there's people who really enjoy seeing their post count go up I guess they have the right to get it, everyone has their own way of getting satisfaction. As long as the BZ is not taken away I don't really care if there's post count or not, or if it can be hidden or not.
If BZ didn't exist, all that people who want to talk about useless topics woudn't have a proper place to do it, and would probably do it in other sections of the forum. That would be messy...