Adapting the behaviour of others is called learning by imitation.
Other drivers and their behaviour shape you as a driver in the same way as your own experiences do. This is a subconscious learning process that can be both positive and negative.
When you are young, your parents and friends play a crucial role in this learning process. If you know that a person close to you is driving irresponsibly, it is important that you do not take on that person's behaviour.