Prominently splayed across the top of the Metrofans BBS:

谦虚谨慎 不谈政治 礼貌回帖 公平公正

Cautiously restrain
Political speech,
Post respectfully,
Judge fairly.

Of course my translation doesn't do it justice, but you get the idea. The BBS has also started an MSN Spaces to make official announcements, I suppose just in case the forum gets shut down for hosting politically objectionable content. When you publicly discuss an industry where eminent domain evictions are routine, that kind of stuff can happen.