As a psychology student, I feel I can weigh in here; this is called the "bystander effect," and "diffusion of responsibility.
Put the two together and basically what you get is: "I don't need to report this, because there are so many people around, surely one of them will report it."
And that's what everyone is thinking.
Look up those terms specifically, and try to read about them from accredited sources, not Wikipedia.
As a psychology student, I feel I can weigh in here; this is called the "bystander effect," and "diffusion of responsibility.
Put the two together and basically what you get is: "I don't need to report this, because there are so many people around, surely one of them will report it."
And that's what everyone is thinking.
Look up those terms specifically, and try to read about them from accredited sources, not Wikipedia.
Good luck. :)