Do the parents are the main factors why this social problem happened?

Mostly are yes. It is because, nowadays, most of our parents are too busy with their work especially who have a good career which is come out with a very good income. Even though at first the real intention is to give a good and comfortable life to their children, the actually have abandon their precious ones. Lack of love and attention from their parents are the main causes for this social problem, street illegal racing or 'mat rempit'. It is because, without a full attention and love from the parents, their children will act freely without any limitations and guidelines and of course, this social problem will get more worse than ever.