Satirical script. Prepend අපෙ හාමුදුරුවනේ to the beginning of every tweet by @PresRajapaksa. Works only on Firefox with Greasemonkey addon installed.

අපෙ_හාමුදුරුවනේ.user.js

// ==UserScript==
// @name            අපෙ හාමුදුරුවනේ
// @include         https://twitter.com/*
// @require         http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js
// @require         https://gist.github.com/raw/2625891/waitForKeyElements.js
// @grant           GM_addStyle
// @icon            https://pbs.twimg.com/profile_images/541867053351583744/rcxem8NU_400x400.jpeg
// @noframes
// ==/UserScript==

var tweetSelector = "p.js-tweet-text";

function fireMainCode () {
    /*--- Only fire on desired pages. This fires on:
        twitter.com/PresRajapaksa*
        twitter.com/PresRajapaksa/status/*
    */
    if (/^\/PresRajapaksa(\/status\/)?/.test (location.pathname) ) {
        if ( ! this.WFKE_fired) {
            waitForKeyElements (tweetSelector, prependToTweet);
            this.WFKE_fired = true;
        }
    }
    else {
        //--- Undesired page, shut off waitForKeyElements
        if (this.WFKE_fired) {
            this.WFKE_fired = null;
            var controlObj      = waitForKeyElements.controlObj  ||  {};
            var controlKey      = tweetSelector.replace (/[^\w]/g, "_");
            var timeControl     = controlObj [controlKey];
            if (timeControl) {
                clearInterval (timeControl);
                delete controlObj [controlKey]
            }
        }
    }
}
fireMainCode ();

function prependToTweet (jNode) {
    var altDoneFlag = jNode.attr ("data-altdoneflag");
    if ( ! altDoneFlag) {
        jNode.prepend ("අපෙ හාමුදුරුවනේ ")
        .attr ("data-altdoneflag", "yes");
    }
}

/*--- Twitter uses some pretty screwy AJAX to "change" pages, but it at least
    changes the title. So listen for that to (re) trigger waitForKeyElements.
*/
var myObserver  = new MutationObserver (titleChangeDetector);
var obsConfig   = {
    //-- Subtree needed.
    childList: true, characterData: true, subtree: true
};

myObserver.observe (document, obsConfig);

function titleChangeDetector (mutationRecords) {
    mutationRecords.forEach ( function (mutation) {
        //-- Sensible, Firefox
        if (    mutation.type                       == "childList"
            &&  mutation.target.nodeName            == "TITLE"
        ) {
            fireMainCode ();
        }
        //-- WTF, Chrome
        else if (mutation.type                      == "characterData"
            &&  mutation.target.parentNode.nodeName == "TITLE"
        ) {
            fireMainCode ();
        }
    } );
}