I'm guessing not much? I was under the impression that nothing you delete on Facebook is ever truly deleted, just marked as disabled and hidden. And if they're logging their API calls it should be fairly straightforward to look up which albums were disabled using that one token and switch the flag back.
Not from this point of view, but from a marketing point of view, deleting photos is quite a power. Imagine being able to ruin a movie's launch while your own movie is all over youtube.
