It's not happened, so I don't know if they already have it in- but it would be incredibly easy to look at the people who were reported as safe and specifically

It's not happened, so I don't know if they already have it in- but it would be incredibly easy to look at the people who were reported as safe and specifically message them to see if they are or not, with a reset and a secondary check. After all, you've got a perfect list of those who already responded.