I am not sure what this boards policy is but after dealings on other boards you are better off allowing ZERO slander, even if the people are bad and every one knows it. One time it may truely be a bad person, the next it may be just a misunderstanding, no way to regulate it with out a judge and jury.

I have seen some stuff come up for sale from people that do bad business and I privatly let those interested know my experience with that person. That is about all we can do.