Yup we've been there too, with members and traders. Amazing really that some such established members/traders can suddenly act in a different way.
This is why we like members to cover themselves, but if they have problems then contact the team for help before naming and shaming as a last resort. While we are quite an active forum, we are still small enough, and these issues infrequent enough, that we dont mind helping out with issues. Rather that than a bum fight start on the forum in public, at least until the facts have been established