There are 5 previous versions of this script.
// ==UserScript==
// @name Hide Read Topics
// @namespace http://thomasknoll.info
// @description Hide Read Topics in weknow Forums
// @include http://weknow.to/forums/
// @include http://weknow.to/forums/discussions
// @exclude http://weknow.to/forums/discussion/*
// ==/UserScript==
var allLi, thisLi;
allLi = document.evaluate(
"//li[not(contains(@class, 'New'))]",
document,
null,
XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,
null);
for (var i = 0; i < allLi.snapshotLength; i++) {
thisLi = allLi.snapshotItem(i);
thisLi.parentNode.removeChild(thisLi);
}