Disable/Remove Wordpress 3.3 Admin Bar

if( !function_exists('disableAdminBar') ) {

    function disableAdminBar() {

        remove_action( 'admin_footer', 'wp_admin_bar_render', 1000 );
        remove_action( 'wp_footer', 'wp_admin_bar_render', 1000 );

        function remove_admin_bar_style_backend() {
            echo '<style>body.admin-bar #wpcontent, body.admin-bar #adminmenu {padding-top:0px !important;}</style>';
        }

        add_filter('admin_head', 'remove_admin_bar_style_backend');

        function remove_admin_bar_style_frontend() {
            echo '<style type="text/css" media="screen">
html {margin-top:0px !important;}
* html body {margin-top:0px !important;}
</style>';
        }

        add_filter('wp_head', 'remove_admin_bar_style_frontend', 99);
    }
}
add_action('init','disableAdminBar');