Actually, no. Because of the good samaritan law, you can help people in danger without any backlash(In fact, in some places, I think it is required by law to help people in danger, as long as your method of helping will not endanger you)
It used to be like how you said, and if, for example, there was a car crash, people would just keep driving, or some people would save them from the car and drive away without giving their name.