Well, Dana, I'll be honest with you. My ex-wife and I fought like rabbid dogs. Now, I did not want to engage in front of our children, but she didn't care. And, all it takes for sparks to fly is one person who has lost their self-control and has allowed fire to rush to their head.
So, I think it all comes down to love and conscientiousness. Out of love for one's child, one should want to spare their feelings. A person should also ask themself if their love for their child is more powerful than their immediate desire to maliciously confront their opponent within ear-shot.