Anyone here overreacted or maybe underreacted about comments made on children's behavior?

Was there any overreacting done here at all by anyone? You have woman #1 who knows none of the other participants, she has three small children. Woman #2 who makes a general comment out loud about woman #1’s kids, that they are running all over the place shrieking. The comment is heard by woman #3 who knows not woman #1 or #2. Woman #3 proceeds to tear woman #2 a new one, at one point telling her “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.” Anyone overreacted or underreacted?