Please help install anti-didndu script

// ==UserScript==
// @name        gfy.com
// @description block  threads,  posts, etc from certain users
// @include     http://gfy.com/*
// @include     http://*.gfy.com/*
// @require     https://code.jquery.com/jquery-1.7.2.min.js
// @version     1.0
// @grant       none
// ==/UserScript==

var hide_users = [
    'TTI-Rich',
    'DVTimes',
    'Twitter',
    'brassmonkey',
    'ShowMe69',
    'AFSC',
    'jerkules',
    'desertfoxx',
    'xXXtesy10',
    'clickity click',
    'johnnyloadproductions'
];

$(document).ready(function () {
    $('#threadslist tbody tr').each(function (thread_index, thread_value) {
        var thread_block = $(this);
        var thread_starter = $('span[style="cursor:pointer"]', this).text();
        $(hide_users).each(function (hide_index, hide_user) {
            if (thread_starter === hide_user) {
//         $('#threadslist tbody:last').append("<tr style='opacity: 0.5'>" + thread_block.html() + "</tr>");
                thread_block.remove();
            }
        });
    });

    $('table[id^="post"]').each(function (post_index, post_value) {
        var post_block = $(this);
        var post_author = $('a.bigusername', this).text();
        $(hide_users).each(function (hide_index, hide_user) {
            if (post_author === hide_user) {
                post_block.remove();
            }
        }); //removes entire post of someone on the ignore list.

        $('div[style^="margin:"]').each(function (post_index, post_value) {
            var post_block = $(this);
            var post_author = $('strong', this).text();
            $(hide_users).each(function (hide_index, hide_user) {
                if (post_author === hide_user) {
                    post_block.remove();
                }
            });
        }); //removes any quotes someone may have made of a person on ignore, even if quotes multiple times but they have to have the name in the quote


    }); //end of nested forloops for checking both posts and quotes.
});