Did anyone overreact, or maybe under-react, to comments made on children's behavior? (revisited)

Well with all the new Jellies I figured maybe there would be a new grain of thought to here this question. In a nutshell, you have woman ‘A’ with small children running amok all over the place. Woman ‘A’ seems clueless to the havoc her kids are making. Woman ‘B’ makes an aloud general comment about how woman ‘A’s kids are disruptive; she said nothing to woman ‘A’, who in fact never heard the comment. Woman ‘C’ heard the comment and proceeds to read woman ‘B’, the riot act. When woman ‘B’ tries to point out the disruption woman ‘A’s kids are creating, woman ‘C’ will have none of it and becomes more angry to the point she tells woman ‘B’, “you don’t say shit about another woman’s kids; that is how trouble starts. Don’t you say anything about those babies, say something else about them and I will slap you.” Was anyone overreacting, under-reacting, and who was doing which? Should woman ‘B’ have mentioned something to the mother directly, by passed her and gone to management? It wasn’t woman ‘C’s kids, so should she have said anything? What is your take?