I used to live in a home where my parents always fight with each other. Not in a day that I could not hear them whining, yelling and arguing. It came into me at that time, that perhaps, it would be better to live alone and away from them. So, I stayed in my grandmothers house and built my own niche there together with my Aunt and her family and of course, with my grandmother. Sooner, my parents realized that they were no longer building a family but instead, a battlefield where weapons are tears, sorrows and hatred. They no longer built a home but barely a house.
So, I'd prefer that parents should never let their children see about the going-ons in their family - fighting and screaming. If the situation is inevitable, they need to settle it once and for all otherwise, children will prefer that it will be a convenient thing for their parents to separate than to experience emotional and psychological instability.