I remember watching Penn and Teller's Bullshit show and they did an experiment. They posted flyers all over a shopping mall that described a missing boy and even provided a photograph. Meanwhile, the same missing boy was wandering around the shopping mall. One lady stood there reading the flyer for about five minutes and as she moved on, the boy crossed right in front of her. She didn't even recognize him. I think people are so busy with their lives, that even though I think they want to help, they are too busy to realize when things are happening right in front of them.