Comment about the Paris video

This video is about a kind of experiment to prove that the people don't help a person who doesn't looks ok. First, a guy dressed like a homeless and started acting like sick and lay in the ground. He stayed like that for five minutes and no one helped him. Then, he do the same thing but dressed with a suit, this time the people stops walking to help him.
I think that the people don't wants to help the other because they are afraid that he could be robbed or something, unfortunately some people use that to steal. But also there is the appearances, if the people see a person who isn't well dressed they won't get close, but if they see someone well dressed they'll go help him without thinking. That's sad because you don't know if you will have help if something happens to you.