You are claiming to have a beef with another user on an unrelated marketplace, but you are not presenting any evidence or context beyond a personal anecdote and testimony. There is no reason for anybody to believe your story or feel you have any credibility in what you are presenting. There is no way for us to enforce the rules of fiverr, but if the user is breaking the rules and terms of Fiverr then you should be able to make a case to the staff/support over on that website. All you are doing here is farting in the wind, unless that user is a user of this forum or has an audience from this forum.
As far as I know Fiverr only accepts Paypal and it is a small minority of users around here that are willing to work with Paypal in any capacity; the cross-over audience is negligible. In your post you mention that we should spread the word of this scammer, and I am wondering what you envision in your head when you say this.. Do you expect us to form a mob on your behalf and fight your personal battles without reviewing any evidence or hearing the other side of the story? This is nonsense at every angle.
Did you read this thread? :
https://bitcointalk.org/index.php?topic=260073.0Have you read any of the stickies found within this section of the forum prior to posting within it?