Ah right, typo makes more sense
But...
It's not a great situation to be in, but it's the only way.
And that's why sometimes it seems as if the snapper is rubbing the snappee's (not a word, I know
) face in it. They're not, they're following best practice. You have to make the action clear to the person with the invalid card, and you have to people in the area aware of what's happening, so there's no sympathy, and therefore
no risk of repercussions. Hence why you see people's cards being cut up at their table in restaurants.