You don't have friends then?
I'm more concerned re: police. Is that an American thing?
If the police show up at my door, I'm better off opening it regardless.
Whether they're here to ask questions about something I may have seen, to warn me of a situation, evacuate the building, or to arrest me, I need to know and it's in my interests to cooperate.
Experience has learned me that people who show up without an appointment usually want money or something else I don't want. Think solliciting for donations, the police, the IRS or a debt collector.
No thanks.