Entering something i believe
They have flags because a flag can show one of two things : The lords coat of arms, and so which noble owns the castle the colours of the lords mater for an example a kings coat of arms or a country's flag , showing where its allegiance lies.
I don't think parents, should lie to their children, as for children shouldn't lie to their parents. I personally think it is all equal. But if a parent is specifically lying to their children about problems that don't really relay on them, then maybe it's okay. But if it includes divorce, or death's I think that it is not okay for parent's to lie to their children, unless protecting them, from something.