As a culture, we have gotten way too comfortable with teenage drug and alcohol use. Many parents minimize the issue because they experimented when they were in high school.
Yes, for most teens it's just a phase, but for some it ruins their (and their families) life.
It's not so much about the drug itself. It's about how and why the person is using the drug.
People are so comfortable with marijuana, they practically send the message to teens that it's totally fine. In this video, I talk about how marijuana affects the teenage brain (For real!)