It's still a long ways off before I need it however facebook issues some Ajax commands as delete? For example, you have a user requesting deletion of their score. A delete request is sent to the graph API with the user token and the score is deleted. Ashley, is it possible to add the delete request at some point?
Delete scores for a user
You can delete the score for a user for your app by issuing an HTTP DELETE request to /USER_ID/scores with a user or app access_token as long as the user has granted the publish_actions permission for your app.