I wouldnt say its a no no,but as a canvasser,if a customer has a WC,we just ok,thanks and move on,we dont undercut or anything,if the householder is not happy or not seen the WC,thats a different ball game.Ive never had a problem yet,in fact if we know that a WC lives there we will knock to see if he requires more business....we have picked up contracts that way.