a piece of advice...

If you are a person that goes door to door...

a salesman

a canvasser

a serial rapist or murder...

Please listen:

First of all if you're one of criminal members of that list?  KNOCK IT OFF... but for anyone else knocking on doors, if you knock on a door and a woman looks out the window and says "What" and you tell her where your from and she says "No thank you"...

Let it go.

Just walk away.

She doesn't want to open the door.  She may have good reason.  For starters you could be a violent criminal masquerading as a door to door salesman, religious missionary or political canvasser.  Maybe she doesn't like to tempt fate.

Maybe she knows that she is just safer if she doesn't answer the door to strangers.

She probably doesn't take candy from strangers either....