I have come to realize that no matter what you say and how much you care, almost everyone goes through their own experiences, their own pain, their own life. You may see the car coming to hit them but they will still want to experience the pain and take the risk even with your warning. We are all, ALL, conditioned in different ways and sometimes we will take people's advice depending on how well we like them, how much they matter to us, and what we are going through in order to listen and heed advice from them.