Userscript that adds a checkbox to the questions page that removes ignored questions from your list.

hideignoredquestionscheckbox.userscript

// ==UserScript==
// @name       Remove ignored
// @namespace  http://statestreetgang.net/
// @version    0.1
// @description  enter something useful
// @match      http://stackoverflow.com/questions
// @copyright  2012+, You
// ==/UserScript==
function exec(fn) {
    var script = document.createElement('script');
    script.setAttribute("type", "application/javascript");
    script.textContent = '(' + fn + ')();';
    document.body.appendChild(script); 
    document.body.removeChild(script); 
}

window.addEventListener("load", function () {
    exec(function () {
        if (typeof(localStorage) === 'undefined' ){ return; }
        
        var name = 'removeIgnoredCheckbox', ignoredName = '.tagged-ignored', isChecked = (localStorage.getItem(name) || 'false') === 'true'; // fucking javascript bullshit fuck you
        var butt = $('<input id="' + name + '" type="checkbox" title="clear ignored questions when checked" style="margin-top:2px;" />');
        $('#tabs').append(butt);
        butt.prop('checked', isChecked)     
  	butt.change(function ()
            {
                var newValue = $(this).is(':checked');
                $(ignoredName).slideToggle(300)
                localStorage.setItem(name, newValue);
            });
        if(isChecked)
        {
            setTimeout(function(){
            $(ignoredName).slideToggle(300)//.detach().prependTo('#questions');
            }, 300); // shit happens too late.
        }
    });
}, false);