I use a cold-call strategy to target small villages and the more affluent type of home. I also ALWAYS take note of any signs/stickers on door and respect the wishes of the householder.
Now here's a funny story. I was in a little village in the cotswolds last week doing some knocking. Went to a house that had a no-cold callers sticker on the door, so respected their wishes and walked away.
Went to next house and had a chat with the neighbour. Not immediately interested, but left info and card and started to walk away.
Was then approached by a lady from the 'no-cold callers' house who asked why I had not knocked.
I explained that I was just respecting their privacy and the sticker on the door etc. She then looked quite shocked and asked what I was doing. Explained about myself and company and how I was just enquiring etc etc.........
Got a cup of tea, a very pleasant conversation about my services etc and went back about 1 hour later and quoted for the entire house.
Doing the job tomorrow!
Asked Madam why, when they have the sticker - Response - She was impressed that I respected her wishes and gave me a some of her time. Respecting the privacy built the trust.
Moral of the story? Respect peoples wishes, one day it will help you out.
I NEVER knock on a door with anything resembling a no-sales type notice, never walk across grass, never direspect anyones house, basically be a nice person, approachable etc and if they say No, smile and walk away with a thank you!