Using jquery tagit plugin, how can i disable only particular boxes?

Question

I've seen the following code (Using jquery tagit plugin, Is there anyway to disable all entry?) that allows for disabling entry into tagit fields, however, this affects ALL the tagit boxes. I want to be able to disable PARTICULAR tagit entries that are affected when a checkbox is enabled. Is it possible to use this method if I want to disable only particular tagit boxes?

This was the css code I added from the example:

 $('#disable').click(function(){
        $('.ui-autocomplete-input').prop('disabled', true).val('');
        $('.tagit-choice').remove();
        $('.ui-widget-content').css('opacity','.2'); 
    });
    $('#enable').click(function(){
        $('.ui-widget-content').css('opacity','1');
        $('.ui-autocomplete-input').prop('disabled', false);    
    });

Since I couldn't get the above to work for particular tagit boxes instead of it being applied for all, I've gone with this approach:

$('#global').on('click', function(){
    if ( $(this).is(':checked') ) {
        $('#region').tagit("removeAll");
        $('#region').tagit({
             showAutocompleteOnFocus: false, placeholderText: "Global...",
             requireAutocomplete: false,
             tagSource: function()
             {
                    $.ajax({
                        data: {term: " "},
                        success: function(data){
                            return data;
                        }
                    });        
             },
             beforeTagAdded: function(event, ui) {
                     return false;
             }, 
         });
       }
    else {
        $('#region').tagit({
            showAutocompleteOnFocus: true, placeholderText: "Select a region...",
            requireAutocomplete: true,
            allowSpaces:true,
            tagSource: function(request, response) 
            {
                $.ajax({
                    data: { term:request.term },
                    type: "GET",
                    url: "${pageContext.request.contextPath}/region_list",
                    dataType: "json",
                     success: function( data ) {
                        array = data;
                        response($.map(data, function( item ) {
                            return {
                                label: item,
                                value: item
                            };
                            }));
                        }
                });
                },
            beforeTagAdded: function(event, ui) {
                if(array.indexOf(ui.tagLabel) == -1)
                {
                    return false;
                }
                if(ui.tagLabel == "not found")
                {
                    return false;
                }
            },
        }); 
    }
});

The above code removes the tagged options and doesn't allow you to add entries, but I want to disable the box as a whole so that nothing appears in the drop down either.