Sure, I’m with you on that. As a one-time transactional system, like verifying that the person presenting an ID card is the person on its photo, fine. I don’t want it going into a permanent database.
Unfortunately not an option and will likely never happen. Nothing has been deleted since around 2005, when storage costs plummeted below the price of selling the data instead.
And they need that money. They don't get anything from terrorists they haven't stopped. If there were a single one, we probably would have heard of it.