Letting a baby cry at the supermarket?-
Could happen, depends on the circumstances, not the end of the world.
Some babies hate to shop even more than my husband and are not shy about (loudly) expressing their disapproval.
Leaving a baby laying in the top part of the shopping cart?-
Very very bad idea.
Not safe.
With nosh on top of her?-
Worse idea.
Neglectful, is the kindest thing I can think of saying.
What would I say?-
Maybe something like, “Excuse me, do you think that’s safe?”
And I would probably get a shrug or a dirty look in return.
Unless the mother was in middle of texting, in which case I’d just be ignored.