You may have heard of FouseyTube, a channel on Youtube. Yousef, the guy behind it, has done a few experiments on society.
You might have seen his Child Kidnapping experiment. He has Nathan, a kid that helps him with videos, walk up to someone, act really scared, and try to explain that someone is trying to kidnap him. Yousef, disguised as the 'kidnapper', walks up and says that he's Nathan's father. One person completely believed Yousef and walked away. If that was real, that kid would have been a goner. They were a few people, however, who stood up for Nathan and made sure his 'kidnapper' stayed away.
He recently did a homeless child experiment here
. Nathan dressed in old clothes with a cardboard sign that said "I just want enough to get a meal for my sister." They filmed for at least 5 hours. Nothing. It was truly heartbreaking. Only one guy gave him money, which was returned. And then something happened 'that can only be explained by fate.' It's better if you watch that part.
Once my dad and I were driving into our local Safeway. On the curb was a homeless man. When my dad came back from shopping, he put a roasted chicken in my lap. He told me to give it to the man on the curb. I did, and that man was so happy. I thought I would cry. It really changed how I felt about helping the homeless. After all, if I don't help, who will?