// ==UserScript==
// @name           pixiv_hide_ad
// @namespace      http://yosiopp.net/
// @description    pixivの広告を非表示にします
// @include        http://www.pixiv.net/*
// ==/UserScript==
(function (callback) {
  var script = document.createElement("script");
  script.setAttribute("src", "//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js");
  script.addEventListener('load', function() {
    var script = document.createElement("script");
    script.textContent = "(" + callback.toString() + ")();";
    document.body.appendChild(script);
  }, false);
  document.body.appendChild(script);
})(function(){
  jQuery.each([
    "ad",
    "adver_top",
    "adver_topBottom",
    "adver_footer",
    "adver_footerBottom",
    "adver_Rightcolumn",
    "ads_value"
  ], function(){$("."+this).hide();});
  $(".area_new").find("a").each(function(){
    if(0<this.href.indexOf("serv.ads")){$(this).closest('.area_new').hide()}
  })
});

http://content.yosiopp.net/js/pixiv_hide_ad.user.js

jqueryのhideを使用した方法に変更。