Anti-Greener for TOMB v.3 Greasemonkey / Tampermonkey script

// ==UserScript==
// @name       Anti-Greener for TOMB
// @namespace  http://www.johnharvest.net/
// @version    0.3
// @description  enter something useful
// @match      http://messageboard.tapeop.com/*
// @copyright  2012+, John Harvest
// ==/UserScript==

function fetchParent(childNode, recursionLevel) {
    var parentNode = childNode.parentNode;
    for (var i=1; i<recursionLevel; i++) {
        var parentNode = parentNode.parentNode;
    }
    return parentNode;
}

function removeSiblings(offendingNode, numberOfSiblings) {
    var offendingParentNode = offendingNode.parentNode;
    for (var i=0; i<numberOfSiblings; i++) {
        offendingParentNode.removeChild(offendingNode.nextElementSibling);
    }
    offendingParentNode.removeChild(offendingNode);
}

//remove posts from topics
matchUrl = "http://messageboard.tapeop.com/viewtopic.php?";
if (document.URL.substring(0, matchUrl.length) == matchUrl) {
    var hrefs = document.getElementsByTagName('a');
    for (var i=0; i<hrefs.length; i++) {
        if (hrefs[i].href == "http://messageboard.tapeop.com/profile.php?mode=viewprofile&u=19456") {
            var twoParentsUp = fetchParent(hrefs[i], 2);
            if (twoParentsUp.className == "name") {
                var fourParentsUp = fetchParent(hrefs[i], 4);
                removeSiblings(fourParentsUp, 2);
                i--;
            }
        }
    }
}

//remove threads from forum view
matchUrl1 = "http://messageboard.tapeop.com/megaboard.php";
matchUrl2 = "http://messageboard.tapeop.com/viewforum.php?";
if (document.URL.substring(0, matchUrl1.length) == matchUrl1 || document.URL.substring(0, matchUrl2.length) == matchUrl2) {
var hrefs = document.getElementsByTagName('a');
    for (var i=0; i<hrefs.length; i++) {
        if (hrefs[i].href == "http://messageboard.tapeop.com/profile.php?mode=viewprofile&u=19456") {
            var oneParentsUp = fetchParent(hrefs[i], 1);
            if (oneParentsUp.className == "name") {
                var threeParentsUp = fetchParent(hrefs[i], 3);
                removeSiblings(threeParentsUp, 0);
                i--;
            }
        }
    }
}