Reddit - Replace NSFW text

// ==UserScript==
// @name           Reddit - Highlight NSFW
// @author         gavin19
// @description    Replaces 'NSFW' with red/bold.
// @match          http://*.reddit.com/*/*/comments/*
// @include        http://*.reddit.com/*/*/comments/*
// @version    1.0
// ==/UserScript==

var s = document.querySelectorAll('.commentarea .md p');
for (var i = 0, len=s.length; i<=len; i++) {
 s[i].innerHTML = s[i].innerHTML.replace(/NSFW/ig, '<span style="color:red !important;font-weight:bolder !important">NSFW</span>');
    }