Peer pressure can happen at any time, can be positive or negative, and can be avoided if people are equipped with the right skills.
Indeed, peer pressure is possible at anytime and may result to a good or bad outcome. Teenagers are more susceptible to this because they are still trying to fit in and experimenting with new things. When the outcome of a peer pressure is positive, then you can always say yes. However, when it is a negative one, a person should be strong and have the right skills to say no to it and should be able to stand on what's right.