Since I actually have someone I want to ignore now, here's a slight update of the script to fix the bit that I see broke with the new version of the forum.  It's still not fancy, but it does a basic job. Works in Firefox with Greasemonkey, probably works in Chrome with Tampermonkey but I've not tested that.
// ==UserScript==
// @name        Go Away
// @namespace   MSB
// @include     http://musoapbox.net/*
// @version     2.0
// @run-at      document-end
// @grant       none
// ==/UserScript==
'use strict';
(function ($) {
    // Users you want to ignore
    var users = ["Name1","Name2","NameN"];
    // Threads you want to ignore
    var threads = ["Thread1","Thread2","ThreadN"];
    // Ignore threads started by ignored users? (true or false)
    var hideStartedBy = true;
    function cleanUsers() { 
      $.each(users,function(index,value) {
          $('li[data-username="'+value+'"]').css('display','none');
          $('span[data-original-title="'+value+'"]').closest('.card').css('display','none');
      });
    }
    function cleanThreads() {
        $.each(threads,function(index,value) {
            $('meta[content="'+value+'"]').parent('li.row').css('display','none');
        });
        if (hideStartedBy) {
            $.each(users,function(index,value) {
                $('.pull-left div[data-original-title="'+value+'"]').closest('li[component="category/topic"]').css('display','none');
            });
        }
    }
    cleanUsers();
    cleanThreads();
    $(window).on('action:ajaxify.end', function(data) {
        cleanUsers();
        cleanThreads();
    });    
    $(window).on('action:posts.loaded', function(data) {
        cleanUsers();
    });
    $(window).on('action:topics.loaded', function(data) {
        cleanUsers();
        cleanThreads();
    });
})(jQuery)