no-loudtwitter.user.js

// ==UserScript==
// @name           No Loudtwitter
// @namespace      http://markpasc.org/code/gm/
// @description    Removes Loudtwitter posts from friends pages
// @include        http://markpasc.livejournal.com/friends*
// @include        http://mark.vox.com/explore/neighborhood*
// ==/UserScript==

(function() {
    function purge(expr) {
        var xpr = document.evaluate(expr, document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);

        for (var i = 0; i < xpr.snapshotLength; i++) {
            var node = xpr.snapshotItem(i)
            node.parentNode.removeChild(node);
        }
    }

    // LJ and Vox posts that link to loudtwitter
    purge("//a[starts-with(@href, 'http://www.loudtwitter.com')]/ancestor::div["
        + "contains(concat(' ', @class, ' '), ' entry ')"
        + " or contains(concat(' ', @class, ' '), ' asset ')"
        + "]");

    // Vox posts titled "Tweets for Today"
    purge("//a[contains(text(), 'Tweets for Today')]"
        + "/ancestor::h2[contains(concat(' ', @class, ' '), ' asset-name ')]"
        + "/ancestor::div["
        + "contains(concat(' ', @class, ' '), ' asset ')"
        + "]");

    // LJ posts titled "Delicious LiveJournal Links" or "tweets for today"    
    purge("//a[contains(text(), 'Delicious LiveJournal Links')"
        + " or contains(text(), 'tweets for today')]"
        + "/ancestor::h3[@class='entry-header']"
        + "/ancestor::div["
        + "contains(concat(' ', @class, ' '), ' entry ')"
        + "]");
})();