If you've directly provided Facebook with some information, you could have recorded this at the time, so their telling you they know that is something you could

If you've directly provided Facebook with some information, you could have recorded this at the time, so their telling you they know that is something you could have figured out for yourself as it's no more than a reminder of what you've already told them. If that's all the law requires them to do then it either needs to be repealed as it's practically toothless, or amended so that they're obliged to tell you more.