I'm never rude to them. On a number of occasions I've chatted to them and invited them in for a cup of tea. On other occasions... "Can't chat for long I'm afraid... I've got to leave in a minute and...". Usually we can find something to agree about. Once, one poor soul was soaked to the bone and freezing and was very grateful to come in for tea and a sandwich and a respite from the cold.

Zen