This is a common thing on here, in real life I think it’s very uncommon to not answer your door or phone, but there are a lot of extreme introverts it seems on here.
Not this again. Only on MN do I encounter so many people scared of their own doorbell.
Mumsnet is a fascinating insight into people’s neuroses.
I agree. Until I joined mumsnet I didn't know anyone who didn't answer the phone or the door.
I appreciate that if you live in a high crime area you wouldn't want to, but then you would install a Ring doorbell or similar, wouldn't you?
Clearly the posters who never answer private numbers don't have any health issues because all NHS numbers show up as private numbers, and they don't leave messages.
And for all the people mocking, ever heard of Jill Dando?
That is just one very extreme example. And she wasn't answering the door, but trying to get into her house.
@Trez1510 yours are very extreme circumstances. I think most replies relate to people who aren't suffering the way you are. I hope you are getting some support with this 
I think knocking on your door without an invitation is really intrusive
That's a really weird way of thinking. Delivery people and postmen/women are being intrusive? Really?
From a security point of view, it's probably better to answer the door/talk to them (with the chain on or via a video doorbell) rather than let random people think your house is empty...
I agree.
I always answer the door because I am nosy, we don't get weirdos round here and it is usually a delivery or a neighbour (all of whom are lovely, and who don't spend ages talking on my doorstep)