I don't find it very helpful to come online and see 42 new posts on BrainKing.com board - all making fun of a deleted post. If the original post gets deleted - what's the point in keeping the responses? It just leaves people confused. I think it is a good practice of other discussion board systems to remove a whole thread, not just the root post. Or not to remove it, but to move it to a troll fare - a cemetery for deleted posts.