I am often on my own overnight because DH works away. I just had someone ring and knock quite persistently on my door. I didn't open it but did go and ask who it was. It was a young looking guy who said he was from a homeless charity. I said I was busy and didn't open the door.
AIBU to think that charities shouldn't be knocking on doors at almost 9pm. It really frightens me when people knock like that and makes me feel really vulnerable.