The point of the matter is etiquette wise you don't publically out someone because they refuse to do a favor for you. Period.
Your the one making it how dare us criticize the mom for her behavior. Well you know what the mom's behavior deserves to be criticized. If the mom wants to criticize my posts, she's fine to do that too. Now do I think the mom is the worst person in the world because she made a mistake. No, not at all. I think the mom was entitled in one specific instance.