The concern I have with the edit button is those who use it as a statement. Look at the large number of CandCs posts in threads he started which he later edited to "..." , redering the thread virtually useless info wise, or Sailaway21's attempt to erase his contributions when he decided to take his ball and go home.
Rather than editing a thread to add new info, why not just update the thread with a new post? This also serves a second purpose, reviving an old thread and bringing it back to the front page, whereas editing an older post leaves a thread out of the spotlight.
What's the point in editing if no one knows that you have added new info?
It's 5 o'clock somewhere:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.