If there were a way to ban users from a specific board, then I would do that, but I like the idea about post count. The thing is, I want the board to be seen, but only certain members can post in it. It is complicated, but not really.
I will just set the board permissions of that board to general permissions though, so anyone can post. However, if this gets out of hand, then people will be warned. And if people like that kept returning to the board, then they would just get warned until they were banned, that makes sense.
Alright, it will be an open board.