When a user deletes a media item, the audit trail records this, but stores its ID as the target. However, the ID is pretty meaningless at this point, because you can't tie it to anything. It would be much more helpful if it saved data such as the media item's filename or file location.
They deleted media item 112? Oh... great?
They deleted media item "RegistrationForm.pdf" - WHAT? they did?!
Again, great plugin, overall :)