This is probably over engineering though. I know for a fact that the two apartment buildings next door have codes that most of the delivery drivers know for thi

This is probably over engineering though. I know for a fact that the two apartment buildings next door have codes that most of the delivery drivers know for this exact purpose. They don't have front desks, so it makes sense that they let themselves in. Is it a security risk for the residents? Maybe. But most would probably vote to allow it given the desire to have the packages delivered.