I don't know the Big Issue seller you are referring to, but you have to be very careful in any dealings with anyone you don't really know. Never give them your address or feel pushed into giving them extra money. There are stories in the press of people being asked to buy nappies for people collecting money and finding they have their purses or bags stolen by accomplices of the person asking, who follow them when they enter the supermarket. Giving small amounts is a nice thing to do, but take care not to be persuaded to give more. Why would they really want to be your friend, when you think about it?
Geoffrey Simms ● 911d