I hate the idea of censorship. However, I have seena Board just mutilated when a "off-topic" came in, and just tumbled downhill.
I was one of the original members of the Homebrew Digest. Like this board for tractors, we talked beer. It was the best early forum I had, and have seen. It was incredible the information that passed to and fro. But then, we had some guy off a "political" board, carrying a flame thrower, start posting. He was a brewer, and wanted to share info. But... he couldn't control his flame thrower. That poor board(it was an email forum originally, before the "web"!) went into a downhill sprial that it never recovered from. It is still around, and a whole new generation posts to it. But, it just is not like it used to be. There is still good info shared, but...
This is not to say the same would happen to this board. But, after seeing that wonderful board spiral out of control, I do not want to see anything happen to this one.