Disable External Scripts: Disables external scripts by preventing them from running.

Disable External Scripts 1.00.js

// ==UserScript==
// @name Disable External Scripts
// @version 1.00
// @description Disables external scripts by preventing them from running.
// @author XP1 (https://github.com/XP1/)
// @namespace https://gist.github.com/1152892/
// @include file://localhost/*
// ==/UserScript==

/*jslint browser: true, vars: true, white: true, maxerr: 50, indent: 4 */
(function (opera)
{
    "use strict";

    var languages =
    {
        en:
        {
            disableExternalScriptsConfirmation: "Do you want to disable external scripts?"
        }
    };

    var options =
    {
        language: languages.en,
        shouldConfirmDisableExternalScripts: true
    };

    var isConfirmed = false;
    var shouldDisableExternalScripts = false;

    var disableExternalScripts = function (userJsEvent)
    {
        if (options.shouldConfirmDisableExternalScripts && !isConfirmed)
        {
            shouldDisableExternalScripts = window.confirm(options.language.disableExternalScriptsConfirmation);
            isConfirmed = true;

            if (!shouldDisableExternalScripts)
            {
                opera.removeEventListener("BeforeExternalScript", disableExternalScripts, false);
                return;
            }
        }

        userJsEvent.preventDefault();
        userJsEvent.stopPropagation();
    };

    opera.addEventListener("BeforeExternalScript", disableExternalScripts, false);
}(window.opera));

I posted this user JS in this thread:

Bug: Opera freezes or crashes while opening saved html files:
http://my.opera.com/community/forums/topic.dml?id=1075222