That is ridiculour conehead, I hope the supermarket realise if she does it more than once - and gives no sense of responsibility or the way to behave to the child, either. I know how upset I was when I got lost as a child - it sounds irresponsible to me.
Look if you could help someone by doing a little thing to make their life a little bit better why not?
Would you stand up on the bus for a woman with a child and shopping?
I know I would