Have you done much door knocking? Is it effective for you? Many years ago I did door to door sales and there were many no's before I got one sale. Very time consuming.
I know that I don't like when strangers come knocking on my door. The dogs get agitated, i have to get up and look through the window first to see if It's the Jehovah's Witnesses again. If I do decide to open the door, i already have a, who the _____ are you and what are you selling attitude. It would have to be one helluva sales pitch to get me out of that state of mind.