Today I stuble upon a facebook application which is not behaving like a virus by default. It is the Creative Commons Application, which adds the possibility of marking your uploaded files and everything else with a creative commons license remark.
Adding the application you will be asked to set the license, you want to use. Then there is a link, you extra have to click upon to allow the application to set status updates. Clicking there you as well need to confirm it.
Recommendable as I think.