crooked comment hider user script

// ==UserScript==
// @name           crooked comment hider
// @namespace      crooked comment hider
// @description    hides redundant comments
// @match        http://crookedtimber.org/*
// @grant none
// ==/UserScript==

cl = document.getElementsByClassName.bind(document);
au = cl("comment_author");
for ( var i = au.length - 1; i >= 0; i-- ) {
	if (['benk', 'cassander', 'brett bellmore'].indexOf(au[i].innerHTML.toLowerCase()) >= 0) {
		co = cl("format_text");
		co[i+1].innerHTML = "<div class='format_text'>(removed)</div>";
		}
}