i still don't see any advantage in leaving front/back doors unlocked, and many terrible possible disadvantages.
are your family not concerned at this practice.
why make yourself needlessly vulnerable.
round here people don't even answer the doorbell unless expected. I tend to shout out the window, no thank you, so that they don't think the house is unoccupied. I certainly wouldn't open the door to unknowns. I know that's a whole other discussion but better safe than sorry.
please be careful.
What were the first ever records that you bought and when?
Parents-in-Law. What do/did you call them?