For all IDEA course feedback surveys. Copy and paste this script in the console and it will mark all radio buttons with the value 5. You can then go through and change the questions you feel deserve less.

idea-online-helper.js

function markAllTheThings(){
  $(document).ready(function(){
    var frameContext = function(){
      return window.parent.frames[1].document;
    };
    // You can change the value of qsox to any number between 1-5 for your default checked value
    $(':radio[qsox="5"]', frameContext()).prop('checked', true);
    
  });
}

(function() {
    var script = document.createElement("script");
    script.src = "https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.min.js";
    script.onload = script.onreadystatechange = function(){
      markAllTheThings();
    };
    document.body.appendChild(script);
})();