"I saw one of their stands in Fareham yesterday. The sisters behind the stand were talking to one another and paying no attention to anyone around them. It was early and there were relatively few passersby but they made no effort to engage with anyone."
They did what they are trained or told to do, my friend. Those behind the stand are informed NOT to approach those passing by or those looking at or taking some of the literature. They should only respond to questions etc, but not take the initiative themselves. That is the point of these stands - people should feel free to have a look and take whatever they want without being constantly asked "can I help you?" as in shops.