Do you usually answer the door when solicitors come to your door?

I've lived in dorms/apartments since moving from my parents', so I've never been approached by solicitors.

That said, if the situation ever arose, I would absolutely never open the door for one.

Which begs the question - who the fuck answers the door to an unidentified person these days? It's 2017, we don't even answer the phone if we don't know who's on the other end.