Have you seen the boards of these other programs? I don't mind guys who want to talk basketball doing it here. It is an implicit acknowledgement that Kentucky is the center of the college hoops universe.
I think the rules should be clear, and they are the ones I follow on the rare times I visit another team's board: Expect some abuse and don't be thin skinned about it; and don't come on as overly aggressive. You don't have to 'win' an argument with Kentucky fans on a Kentucky board. State your point of view, and accept that its a minority perspective.