@Tsing Tao: You have raised this First Amendment Right issue a few times. I don't know your background. But here is something to ponder.
You are correct that bigoted speech or "hate speech" is not an exclusion under Freedom of Speech (while "Fighting Words" are). The problem arose when the Supreme Count granted a "group libel" exclusion to Freedom of Speech in 1952. However, later court decisions have chipped away that "group libel" exclusion, and at present it is widely agreed by Constitutional law experts that "group libel" exclusion no longer exists for Freedom of Speech. So, making bigoted speech in these forum is indeed covered by Freedom of Speech.
However (and this is a big however), the bigger issue for Baron is Civil Liabilities. As a private forum, bigoted speech (and "hate speech") could -- and most likely will be -- considered a civil liability issue. Thus far, the Supreme Court has excluded bigoted speech from civil liabilities only when the institution involved is a public institution. This is a big issue for Baron and he has to deal with it -- no amount of "Warning" could waive the civil liabilities issue. However, given that this is an online forum, the law is little murky here. I am sure Baron would not want to find out either!
So, while you are correct that TGregg's speech is protected by Freedom of Speech, the bigger issue for Baron would be Civil Liabilities. Hence, one cannot necessarily, in a private forum, say whatever they choose to say citing Freedom of Speech, unless of course, you don't care what Baron has to deal with later!
Regards,
Monoid.