You know, you will get banned if you only them hear one side of the story.
You *might* be right to delete some or all the material - what I wrote might be factually incorrect. But you need to source and discuss and generally obey the rules that you signed up to when you opened a wiki account. Calling someone a "menace" in a forum follow of your friends because they are asking you to live up to standards you agreed to may make you feel better, but it isn't terribly helpful or mature.