I'm plagued periodically by floods of comments originating at various forum sites. I'm pretty sure there isn't yet a way to do this, but I wanted to try to plant the seed (for a plugin?) in someone's mind:
I'd like to be able to ban anyone from commenting (or visiting?) who comes to my site from a specific url or domain. Let's say my commenter is coming to my post from http://www.exampleforum.com/discussions/thread.php?t=331697.
I don't know the technical issues involved in this & perhaps it's not feasible. But it would sure work wonders for me in preventing blog assaults.
To be clear, I don't mean that I want to ban commenters who use a specific domain or url in their comment ID info. I want to somehow connect the URL or domain they CAME FROM to preventing a comment.
I don't think you can do this w. cPanelx. I know you can deny access by IP. But I don't believe you can deny access by domain...or can you?