What is the biblical basis for systematic Antinomianism, or, if you prefer, extreme Grace? 

I am looking for someone with first hand knowledge of its teachings who can justify this view. [Wikipedia][1] lists verses of the Bible which seem to counter it. A good answer will  rebut those verses from an Antinomianist's perspective. 

  [1]: http://en.wikipedia.org/wiki/Antinomianism#Opposing_Pauline_passages