Presents a set of buttons to quickly down-vote questions & answers for automatic deletion. (AKA Roomba candidates) See documentation:http://stackapps.com/questions/6599/roomba-vtz-vote-to-zero.

Roomba-VTZ.user.js

// ==UserScript==
// @name         Roomba-VTZ (Vote-to-zero)
// @namespace    https://gist.github.com/mogsdad/ed30af363a376ec4a1c2
// @version      1.2
// @description  Presents a set of buttons to quickly down-vote questions & answers for automatic deletion. (AKA Roomba candidates)
// @author       David Bingham (Mogsdad)
// @include      /^https?://(meta\.)?(stackoverflow|stackexchange|serverfault|superuser|askubuntu|stackapps)\.com/questions/[0-9]+.*/
// @grant        none
// ==/UserScript==

(function () {
    // Filter function
    // Based on http://stackoverflow.com/a/965962/1677912
    $.expr[':'].ancestors = function(a,i,m){
        return $(a).closest(m[3]).length < 1;
    };

    // Only run on closed non-duplicate non-migrated questions with no accepted answer (migrat matches migrated and migration)
    if (!($('.question-status').length > 0) ||
          $('.question-status').filter(':contains("duplicate"), :contains("migrat")').length > 0 ||
          $('.vote-accepted-on').length > 0)
        return;

    // Check available horizontal width for VtzDiv
    var logoRect = document.getElementById('hlogo').getBoundingClientRect();
    var navRect = document.getElementById('hmenus').getBoundingClientRect();
    var availableWidth = navRect.left - logoRect.right;
    
    $('#hmenus').before($('<div id="VtzDiv" style="position: absolute;left:'+ (logoRect.width + 7.5) +'px;"><table id="VtzTable"><tr id="VtzRow"/></table></div>'));
    
    // Hide VtzDiv to avoid jumping display (not needed, it turns out)
    //$('VtzDiv').css({"opacity":"100%"});
    
    $('.vote').filter(':ancestors(.deleted-answer)')                                    // Find votes for question & undeleted answers
    .closest('td').clone(true).appendTo("#VtzRow")                                      // Make table of vote cells
    .find('[class^="star"],.favoritecount,.vote-accepted-on,.bounty-award').remove();   // without unecessary flair

    if ($('#VtzTable').width() > availableWidth) {
        // Need to scale the table
        $('#VtzDiv').css({'transform-origin':'0% 25%','transform':'scale('+ availableWidth/$('#VtzTable').width() +')'});
    }
    // Show final table
    //$('VtzDiv').css({"opacity":"0%"});
})();