I need to limit the number of posts that people submit per day. Most of my users submit between zero and two stories per day, while a couple of them submit ten to twenty. This is not a spam problem. I just want things balanced out so that people with an axe to grind on some specific topic don't dominate the whole site. Hotaru used to do this and it worked well for balancing the axe grinders out. I've had to switch to Pligg because development on Hotaru seems to have been abandoned.
Does anyone know how to do this?