Actually, what is needed is "merge comments to..." that can pick up and move the replies.
Or maybe we should implement something like /. has where you can't start multiple nodes within so many minutes of posting. (Anon might need IP added to it to keep from blocking multiple people posting near each other). Maybe even a short "are you posting twice? check Newest Nodes. If you are Anon, reply to your own post with updates, if logged in click the post to edit. Wait 2 minutes if you really want to start a second discussion".
$you = new YOU;
honk() if $you->love(perl)