Syndication spam

Came across a weird problem today. Got a pingback from card4badcredit.com/2005/08/29/

On checking the site I see the post had my post syndicated in it.
I haven’t been able to track it down, however I have put him in the SK2 block list.

Also will be blocking him via .htaccess.
But how do I prevent this in the future.

Thanks to Feed Copyrighter Plugin from http://blog.taragana.com/index.php/archive/wordpress-plugins-provided-by-taraganacom/ his/her post has a glaring copyright violation notice.