Thinning the herd.

[onlydarksets]

This would seem to be a good policy:
1 post per day for every month you've been a member
No limit after 1 year
Getting banned resets the "counter"

Even better, the posting limit would not apply to the non-Locker Room forums. I'm not sure if any of this is even possible, but it seems like it would control the chatter a bit.