I have found in the case of souvenir/craft people telling them " No mon..This is not gift shopping day - Thats end of the week" This year had a fine time messing with a couple of hustlers by the Hi/Lo who wanted to sell me Valium & Viagara..Stopped them in their tracks with "Hang on there - Doesn't one of those cancel out the other ?" They thought it over and I walked off. A sense of humour and a smile sure helps..