One trick they can pull out in the future is to write into the terms of service that you can't use the service to develop extensions manipulating the service. Then they change something, anything to make the extension not work. If the extension gets fixed, clearly someone broke the terms of service.

Watch for a terms of service update from facebook.

I had a company fire this at me back in 2000 or so. It worked, in that it wasn't worth dealing with the issues and I stopped. It didn't work in the sense the company is long gone anyhow....