Teenagers are people that engage in risky behavior. They drink, engage in sexual intercourse and do many other bad decisions, giving people a reason to think all teenagers are this way. I’ve noticed that many parents and people who do not know their children tend to think they will become moody or ill-mannered. But this isn’t always the case.
While it is true that the teenage year are stressful, and the changes in your body make you do questionable things, they do not make teenagers bad people. In fact, some people's stereotypes and judgement of teen makes them become this way. The higher restrictions or the higher the expectations for a child will make them act exactly in that way.
This in mind, maybe you shouldn’t judge a book by its cover, and see what a person is like after talking with them.
Some people aren't so easily seen though, as they have a lot going on in their lives, and are skilled in hiding their emotions. These people can express themsleves by dressing a certain way, bullying others, or engaging in a dangerous amount of high-risk but high-pleasure activities.
These people are just trying to find a release, but they won't get better from doing these activities. At some point in every persons life, so need to stand up and do whats right for you.