Hmm...it does seem a bit pointless. If people are that concerned, can't they just recheck the thread before they post? I'm not a fan of people doing "post and run" on these forums. Once you've posted, you should look over it quickly to make sure it looks good (the amount of times staff have to fix quotes...), and you can easily scroll up to see if things have been posted.
Then, you can either edit your post or post a new one (which should get merged automatically with the post you just made).
Then, you can either edit your post or post a new one (which should get merged automatically with the post you just made).