If you or your children are hungry and stealing food is your last resort you have the moral right to do so...that is it. Stealing is something you do, who you are stealing from is irrelevant, others immoral behavior does not justify yours.
...and The Red Cross is a multi national corporation.
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Video surveillance paired up with the records of the purchase. I heard a rumor about a neighbor who got a bill in the mail after using a self check out and missing an item. Reportedly it was a mistake but I don't even know if this story is true so ...