Teenagers are the ones most susceptible to negative influence. The mob psychology around an especially impressionable person might have, if not fatal, very negative consequences to the individual's life. Most of the people I have met on my spare time, meaning they are not connected to me in any way, shape or form, from jobs, school, whatever, have admitted to have either tried smoking or alcohol before the age of sixteen. This usually happens when there is a group of people, and all their friends are there, egging them on. Because most people in these situations don't have the spine to risk their friendships, they usually give in, even if they're not one hundred percent on board with it.

When people get a little into their teens, around sixteen or seventeen, some start attempting to break free from the obedient sheep they were before. They are done with the strict rules of childhood, they are tired of always having to do what others say. This is in my opinion a good attitude, people learn to become self-supportive, and this helps prepare them for the real world. Unless, that is they don't grow up at all. The world is filled with students, even people in their early twenties, both acting and being treated like thirteen year olds. They live in a personal bubble, where everything is handed to them, and when that bubble breaks, they won't even realize just how fucked they really are.