A British librarian, from Newcastle on the river what-it's-name, told me that he was often bothered by people when he traveled with his high end photo gear. Too many of them would see his equipment and ask him to take their pictures in front of tourist attractions. He would deliberately chop their heads off in the pictures he took so that they would have a little surprise when they got their film developed. They would probably make their own assumptions and tell others about this stupid British tourist who had tons of equipment but couldn't take a picture.