они там совсем с ума посходили со своей рекламой. скоро рекламы будет больше, чем контента.

новая версия:

// ==UserScript==
// @name        rusdtp.ru chat blocker
// @namespace   rusdtp-chat-blocker
// @include     http://rusdtp.ru/*
// @version     1
// ==/UserScript==

// Main
function main() {
    
    var earr = document.getElementsByClassName('borderwrap');
    if (earr.length > 0) {
        var e = earr[0];
        if (e.children.length > 2) {
            var child_div = e.children[0];
            var child_script = e.children[1];
            var child_frame = e.children[2];
            if (child_div.nodeName == 'DIV' && child_script.nodeName == 'SCRIPT' && child_frame.nodeName == 'IFRAME') {
                var child_br = e.children[3];
                e.removeChild(child_div);
                e.removeChild(child_script);
                e.removeChild(child_frame);
                if (child_br.nodeName == 'BR') e.removeChild(child_br);
            }
        }
    }

    var fstr = 'http://rusdtp.chatovod.ru/';
    var earr = document.getElementsByTagName('iframe');
    for (var i = 0; i < earr.length; i++) {
        var e2 = earr[i];
        if (e2.getAttribute('src') && e2.getAttribute('src').substr(0, fstr.length).toLowerCase() == fstr) e2.parentNode.removeChild(e2);
    }
    
    var fstr = 's-8547f282cc28bcb6d4c2fa959d456fdf';
    var earr = document.getElementsByTagName('script');
    for (var i = 0; i < earr.length; i++) {
        var e2 = earr[i];
        if (e2.getAttribute('id') && e2.getAttribute('id').substr(0, fstr.length).toLowerCase() == fstr) {
            var e3 = e2.parentNode;
            e3.parentNode.removeChild(e3);
        }
    }
   
 }

/**
 * Opera reads user.js files as greasemonkey notation with the following results:
 *   - "Not permitted to use window.opera.addEventListener."  Alternate addEvenetListener supported, but with wonky syntax
 *   - DOES NOT WORK: addEventListener('DOMContentLoaded', main, false)
 *   - WORKS: addEventListener('DOMContentLoaded', main(), false)
 *   - Always runs after creating the DOM for the page; does not support // @run-at document-start 
 * Opera reads .js files (NOT ending in user.js) as default with the following results:
 *   - Allows use of window.opera.addEventListener
 *   - WORKS: addEventListener('DOMContentLoaded', main, false)
 *   - DOES NOT WORK: addEventListener('DOMContentLoaded', main(), false)
 *   - "It is usually run before the DOM for the page has been completed," so // @run-at document-start is redundant
 *   - Need to attach main() to an event listener, because DOM may not be ready when script is loaded.
 * More info:
 *   - http://www.opera.com/docs/userjs/using/  (Adding User JavaScripts)
 *   - http://www.opera.com/docs/userjs/examples/  (Greasemonkey scripts)
 */
if (window.opera) {
	// Opera's greasemonkey version of addEventListener() breaks try-catch on error, so it must be called first.
	try {
		document.addEventListener('DOMContentLoaded', main(), false)
	}
	catch(err) {
		document.addEventListener('DOMContentLoaded', main, false)
	}
}
else {
	// FF, Chrome
	document.addEventListener('DOMContentLoaded', main, false);
}