Well red, the problem is that some people join the BB after years of playing the game. They know whats going on, and how to act mature (usually).
That's issue #1. 
Jahawk brings up issue #2, spam.
Issue #3 revolves around folks who have been around the BBS for a LONG time and just don't post much.  Take a look at that thread about people with the least amount of time or posts, based on really old join dates.  
-1, despite good intentions here.  
Wrongway has a valid idea, but look at how many people don't read other stickies...