However, in real-life situations, the policy regarding kids' friends coming over to a house unannounced is entirely up to the house's owner or the parents/guardians of the child involved. Different families have different rules and comfort levels regarding unannounced guests, and there's no one-size-fits-all answer.
Some families might have an open-door policy and be perfectly fine with their kids' friends dropping by unannounced. Others may prefer that their child's friends let them know in advance or that they arrange playdates in a more organized manner. It often depends on factors like safety concerns, family schedules, and personal preferences.
Open communication between parents, children, and their friends is essential in navigating such situations. It's a good idea for kids and their friends to be aware of the house rules and respect the preferences of the household they are visiting. If in doubt, it's always best to ask and ensure everyone is on the same page.