Sure, you can block all of these URLS. This means you block jQuery, all other Javascript, all CSS, all images, the user-clickable URLs on the page, etc. The po

Sure, you can block all of these URLS. This means you block jQuery, all other Javascript, all CSS, all images, the user-clickable URLs on the page, etc. The point was that all URLs get encrypted/replaced at the proxy. If you load the page and block all of them, you get not only a page that doesn't work, you also lose access to all other pages on the site. This is an extremely rude way to run a website; it completely betrays your contempt for and mistrust of the client. Given that quite a few websites already demonstrate this with their malicious and purposfully-misleading ads, I expect they won't think twice about capturing all URLs with a proxy (or similar technique). Incidentally, this type of method could be extended very easily to prevent all deep linking. Also note that this isn't theoretical. I saw this done in... 1998/1999. It had problems and was expensive to run on the server, but I suspect Moore's law has easily had enough time to solve that problem.