Does anyone else get anxious when they hear a knock on the front door?

Hi all. 

Do you get all anxious when someone knocks on your front door and you just want them to go away? The abruptness and unknown makes me really tense. Needless to say, I never answer my door unless I am expecting someone or a package. If it's important they can text me (should they have my number) or drop a note through my letter box or something.

I also don't answer phone calls from unknown or numbers that I don't recognise. If it's important, they usually text or leave a voicemail.