Chrome user script to unblur Quora answers without signing up

unblur_quora.user.js

// ==UserScript==
// @match http://*.quora.com/*
// ==/UserScript==

// a function that loads jQuery and calls a callback function when jQuery has finished loading
function addJQuery(callback) {
  var script = document.createElement("script");
  script.setAttribute("src", "//code.jquery.com/jquery-latest.min.js");
  script.addEventListener('load', function() {
    var script = document.createElement("script");
    script.textContent = "(" + callback.toString() + ")();";
    document.body.appendChild(script);
  }, false);
  document.body.appendChild(script);
}

// the guts of this userscript
function main() {
    $('.blurred_answer_wrapper').removeClass('blurred_answer_wrapper');
    $('.with_signup').removeClass('with_signup');
    $('.signup_cta_on_answer').remove();  
}

// load jQuery and execute the main function
addJQuery(main);