Good points Webslave!
For everyone else, a little civics lesson from a Political Science Graduate student, if you don't mind <img src="http://www.faunaclassifieds.com/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt='

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First, the freedom of speech that we enjoy in this country is freedom from GOVERNMENTAL CONTROL of our speech. We do NOT have the right to be heard by other people. If a privately owned message board (read that as BOI) has rules that eliminates the type of speech in which you wish to engage, then it is your right to seek another board that supports you in your endeavors, but that first privately owned board DOES NOT have to yield to anyone's wishes but those of the owner (read that as Rich Z.)!
Second, the Constitution is in no danger from the BOI or any other such message board, because it only deals with the relationship between the government (all levels of it) and the citizens it governs. This is why you have to take civil complaints to an entirely different court system, which opperates undaer a separate system of rules than does the criminal justice system. One deals (primarily) with issues between private citizens, and the other with issues between the government and individual citizens.
Too often we hear people say, "Well, I have freedom of speech, so you can't stop me from saying 'X'." That's simply not true. The Government (usually) can't control our speech, but Rich Z. is under no such requirement to allow ANYONE to post here. He can control this site in any way he sees fit, and we can either like it or go elsewhere. It's kind of like people on the BOI saying, "In this country, you're innocent until proven guilty." Well, that's true in the court system where the government has that high standard of proof required before it will take away a person's property, freedom, or life, but individual citizens are not at all required to give such a presumption of innocence to an accused. After all, I am certain that OJ Simpson killed two people. He was found "not guilty" by the courts, so he didn't go to prison, but I don't have to play golf with him or introduce him to my daughter, because I have every right to find him guilty as all get out in my own mental courtroom.
Let's not get all hung up in citing Constitutional basis for ourselves anytime someone else says, does, or thinks something with which we don't agree. After all, the Constitution DOES protect us from the thought police in the government. So, we can probably handle ourselves among ourselves without dragging that fine document into every discussion about Rich's rules or every accusation about someones alleged bad dealings. Don't ya think?