Most people faced peer pressure when they were young, many outgrow the pressures while others continues in the lifestyles, many habits like gambling, smoking, drinking and pilfering starts from peer pressure. I don't think that it is easy to learn new habits when someone is older, it is mostly something that they have experience before. Most kids rates how smart they are by stealing from supermarkets, they will brag about how smart they are if they were not caught, if they don't outgrow the habit and leave it they will become criminals in their older years.
Exactly, sometimes parental upbringing matters alot, when I was small my dad warned me that anyday he hears that I went to our river that he beat me. One day I decided to go against his orders, that day he wiped me so heard that I pee on my cloth, ever since I never deared go back. Though will I say it affected me because that fear alone made me not to know how to swim

As a guidian to numerous kids in my society, peer pressure is beyond a pressure it's a lifestyle battle for children. Few hours ago, while on a walk, I met four kids heading to swim in a natural pond, which was on same direction to my location, when they got there, one refused to swim, the other three enjoyed their moment while he watched but after a few minutes the child who sat on the shores left and went home.

Get this point, the other 3 didn't brag about being better swimmers, but the other child wasn't feeling cool about not jumping into the water like his friends did, and knows that sooner they'll begin to discuss about that and chose to leave or go home.

That's what this does to kids it makes them feel unfulfilled at a given time, and if he can't avoid their company, he'd have to join in the swimming someday, which is risky, because the pond is in a lonely part of the county and nobody would rescue them if any danger comes up. Though I don't wish they get hurt.