I want to say something. I don't really think that an emblem like this would just encourage negative spammy posts.
But, hasn't anyone thought that it can also encourage mature, constructive posts in the forum under the correct constraints?
5,000 posts for a blog is a lot. It requires the normal member to be part of the community for a good while and to make all those posts. They are also under the constraint that if they are spammy along that way, they will never get there because of infractions, eventual depression in social view, and bans. Not everyone is exactly a total idiot.