People from the YouTube DMPranks chain wanted to make a social experience with a child sitting on a park bench, not far from him they placed posters as what the child was gone missing.
What was their experience? It's not complicated, they wanted to see if people would be able to recognize an abandoned/lost child.
You would think, for sure they would recognize him, the poster is just a few feet away from the child, well I would say that you are wrong.
Watch the video and you'll see that there are people who do not seem to care about what's happening around them.
There's a lesson to be learned: Don't mind your business all the time.