Choose the targets carefully (Score 1)

We're somewhat at cross purposes here. I agree with your general thrust - these cards pose huge civil liberties risks. Take Simonetta's comments, for example.

But in this instance, you had to ask them to notify you.

I suspect you are right about the other stores. Altruism is rarely their strong point. The dilemma is that one store has used their data responsibly. What privacy advocates need is an out and out example of abuse. Before it is too late....