There is no other way. You can't do any IP blocking as it is a client side web app, and as it is a client side web app, all data and strings will be available t

There is no other way. You can't do any IP blocking as it is a client side web app, and as it is a client side web app, all data and strings will be available to the users. I imagine however that a small wrapper won't be too hard to write. Make sure you add a good limit on it though (based on user, ip, (or a combo), whatever fits so yours is not used to freely access Flickr)