buh_bye_reasonable.js

// ==UserScript==
// @name         Political Wire - Hide Comments by Troll
// @namespace    https://politicalwire.com/
// @version      1.1
// @description  Removes Disqus comments posted by specified trolls
// @match        https://politicalwire.com/*
// @match        https://*.disqus.com/embed/comments/*
// @grant        none
// @run-at       document-start
// ==/UserScript==

(function () {
   'use strict';

   const blockedTrolls = new Set([
      'Reasonable'
   ]);

   function removeBlockedComments(root = document) {
      const trollLinks = root.querySelectorAll(
         '.post-byline .author a[data-action="profile"]'
      );

      for (const trollLink of trollLinks) {
         const trollName = trollLink.textContent.trim();

         if (!blockedTrolls.has(trollName)) {
            continue;
         }

         /*
          * A Disqus comment is normally contained in an <li class="post">.
          * The additional selectors provide fallbacks if Disqus changes
          * its surrounding markup.
          */
         const comment = trollLink.closest(
            'li.post, article.comment, div.comment, [data-role="post"]'
         );

         if (comment) {
            comment.remove();
         }
      }
   }

   function startObserver() {
      removeBlockedComments();

      const observer = new MutationObserver((mutations) => {
         for (const mutation of mutations) {
            for (const node of mutation.addedNodes) {
               if (!(node instanceof Element)) {
                  continue;
               }

               if (
                  node.matches('.post-byline .author a[data-action="profile"]') ||
                  node.querySelector(
                     '.post-byline .author a[data-action="profile"]'
                  )
               ) {
                  removeBlockedComments(node.parentElement || node);
               }
            }
         }
      });

      observer.observe(document.documentElement, {
         childList: true,
         subtree: true
      });
   }

   if (document.readyState === 'loading') {
      document.addEventListener('DOMContentLoaded', startObserver, {
         once: true
      });
   } else {
      startObserver();
   }
})();