gistfile1.js

// ==UserScript==
// @name - Twitter List Delete
// @include http://twitter.com/*
// @author - t.ashula
// ==/UserScript==

(function(){
  if ( $("#admin_list a.destroy-list") ) {
    $("#admin_list a.destroy-list").unbind('click');
    $.fn.isDestroyListLink=function(){
      return this.click(function(D){
        var C=$(this);
        var A=C.next("form");
        var B=A.attr("action");
        if(confirm(_("Are sure you want to delete this list? There is NO undo!"))){
          $.ajax({
            url:B, type:"POST",
            dataType:"json",
            data:{
              _method:'delete',
              authenticity_token:twttr.form_authenticity_token,
              twttr:true
            },
            beforeSend:function(){C.disable()},
            success:function(){document.location="/"},
            error:function(){alert('delete error');C.enable()}
          })
        }
        return false})
      }
      $("#admin_list a.destroy-list").isDestroyListLink();
    }
})();